- 250 - SECTION 422 -- TEMPORARY TRAFFIC CONTROL SIGNS AND DEVICES
422.01 Description
1.The Contractor shall furnish, install, operate, and maintain temporary traffic control signs and devic es at the locations shown in the contract. When the work is complete, the Contractor shall remove the temporary traffic control signs and devices described in this Section.
2.Permanent Signs
a.Permanent Signs (Sign Day) are signs furnished by the Department and installed and maintain ed by the Contractor on posts and hardware supplied by the Contractor whic h are subsidiary to the “Sign Day” pay item.
3.Temporary Signs a. Temporary Signs (Temporary Sign Day) are signs furnished by the Contractor and mounted on temporar y sign supports supplied by the Contractor which are subsidiary to the “Temporary Sign Day” pay item.
b.Barricade Signs (Barricade Sign Day) are signs furnished by the Contractor that are mounted on barricades that are paid for separately by the Department.
4.General Requirements: a. All signs and devices shal l be constructed and erected in accordance with the contract and MUTCD.
b.Sign legends and symbols shall be of professional quality workmanship and in uniformity with the Standard Highway Signs and Markings Manual. All signs shall meet the requirements of the American Traffic Safety Services Association (ATSSA) "Quality Guidelines for Work Zone Traffic Control Devices”. Hand printing or poor workmanship shall not be allowed.
c.The initial placement, replacement, and removal of the traffic control signs and devices shall be done with extreme care and consideration for the traveling public.
d.Permanent and temporary signs and devices shall not be removed without the Engineer's approval.
e.The temporary traffic control signs and devices, except materials furnished by the Department, shall remain the property of the Contractor. Temporary Traffic Control Signs and Devices 422.02 - 251 - 422.02 -- Material Requirements
1.Permanent Signs: a. The Department will furnish the permanent signs on an appropriately sized panel at one of the maintenance headquarters located throughout the State. These are as follows: Table 422.01
2.Temporary Signs
a.“Temporary Signs” shall consist of approved retroreflective fluorescent orange or white signs mounted on temporary sign supports. The color and design of the signs shall be as required by the MUTCD and the contract. Retroreflective fluorescent orange sheeting used for temporary signs shall be on the Department ’s Approved Products List.
b.Rigid sign substrates that have been approved to NCHRP 350 or MASH (TL-3) may be used. When used, the rigid sign substrate with sign sheeting and temporary sign support shall, all together as a single tested unit, be NCHRP 350 or MASH (TL-3) approved.
c.The temporary sign supports shall have enough vertical rigidity to support the sign in an upright position and provide continuous legibility of the sign legend in gusty conditions (wind or vehicle gusts). The Engineer shall determine the adequacy of visibilit y. Temporary sign supports that fail to provide adequate visibility of the sign shall not be allowed.
d.Signs required for flagging shall meet the “Temporary Sign” requirements of this Section.
3.The following items shall meet the requirements described in the contract:
a.Barricades (Type II & III)
1.Reflectorized Plastic Drums (2) 42 inch Cones b. Temporary Traffic Signals c. Concrete Protection Barriers d. Vertical Panels
4.The following items shall be on the Department’s Approved Products List to be used on a Department project:
a.Inertial Barrier Systems Maintenance Headquarters Ainsworth Alliance Bridgeport Broken Bow Chadron Columbus Fairbury Fremont Geneva Gering Grand Island Hastings Holdrege Imperial Kearney Lincoln McCook Mullen Neligh Norfolk North Platte Omaha O’Neill St. Paul Sidney South Sioux City Tecumseh Valentine Wayne York
422.02 Temporary Traffic Control Signs and Devices
- 252 - b. Flashing Arrow Panels
c.Tubular Posts
d.Opposing Lane Dividers
e.Temporary Glare Screen f. Portable Dynamic Message Signs g. Tubular Post and Curb Systems h. Fluorescent Orange Sheeting. The fluorescent orange sheeting shall meet the luminance re quirements of Table 422.02. Table 422.02 FHWA Luminance Facto r Luminance Factor Y T Sheeting Type Min Max Fluorescence Luminance Factor Limit, Y F Fluorescent Orange 25 None 15
5.Sign Covers:
a.The Contractor shall provide hard covers for signs left in place and currently not in use.
b.The covers shall be the same size as the sign and completely cover the sign when installed.
c.Bolting the cover to the sign by drilling holes through the sign will not be allowed.
d.The cover shall be constructed so there will be at least a 1/8 inch (3 mm) space between the sign and the cover when installed.
e.Spacer blocks are only allowe d in the border area of the sign.
f.The cover will be fastened so that it will not come loose or damage the sign during normal or windy conditions.
6.National Cooperative Highway Research Program (NCHRP) Report 350 and Manual for Assessing Safety Hardware (MASH) Requirements.
a.Traffic control devices shall be crashworthy and qualify as such according to the testing and acc eptance guidelines of the National Cooperative Highway Research Program (NCHRP) Report 350 or Manual for Assessing Safety Hardware (MASH). Traffic control devices have been classified into four (4) categories. The following is a list of categories and compliance requirements.
1.Category 1: Includes traffic cones, tubular posts, vertical panels, flexible delineator posts, and reflectorized plastic drums with no attachments. The Contractor shall provide the Engineer a copy of the developer’s self-certification of the devices used. Temporary Traffic Control Signs and Devices 422.03 - 253 - (2) Category 2: Includes Type II and III barricades, portable sign supports, intrusion alarms and cones, vertical panels and plastic drums with a light or sign attached. The following compliance requirement for Category 2 devices shall be used:
i.The Contractor shall provide the Engineer a copy of the FHWA acceptance letter for all NCHRP 350 or MASH (TL-3) compliant Category 2 devices when used. ( 3 ) Category 3: Includes concrete protection barriers, fixed sign supports, truck mounted attenuators (TMA), and work zone crash cushions (WZCC) and other work zone devices not meeting Category 1 or 2.
i.The Contractor shall provide the Engineer a copy of the FHWA acceptance letter for all NCHRP 350 or MASH (TL-3) Category 3 devices when supplied by the Contractor. (ii) Fixed breakaway sign supports for work zones shall be tested under the AASHTO Standard S pecifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals, and accepted by the FHWA. ( 4 ) Category 4: Includes portable or trailer-mounted devices, such as flashing arrow panels, temporary traffic signals, area lighting supports and portable changeable message signs. Crash testing is currently not required for Category 4 work zone devices.
7.Type A, B, and C barricade lights shall be on the Department’s Approved Products List. Type A, B, and C barricade warning lights shall comply with the requirements for warning lights in the MUTCD.
8.Posts for mounting Permanent Signs or Temporary Signs shall be wooden 4x4 or 4x6 posts, or perfora ted square steel tubing meeting the requirements of NCHRP 350 (TL-3) or MA SH when tested all together as a single tested unit.
422.03 Construction Methods
1.General Requirements a. The Contractor shall install, maintain, and remove all signs and devices in accordance with the details of and at the locations shown in the contract. The Contractor shall fu rnish all necessary posts, support standards, bolts, or other fasteners for signs.
b.The Contractor shall mainta in a stock of spare lights, signs, devices, and repair parts at the proj ect site for immediate emergency replacement or repairs.
c.The Contractor shall mow or trim vegetation to insure that the complete visibility of signs, barricades, and other warning devices is maintained at all times. The contractor shall maintain vegetation to a height less than 12 inches around the device.
d.The Contractor shall, at the preconstruction conference, provide the Engineer with the names and telephone numbers of personnel who will be available on a 24-hour-per-day, 7-days-per-week basis. These people shall be responsible for repair, correction, replacement, and maintenance of the traffic control devices.
422.03 Temporary Traffic Control Signs and Devices
- 254 - e. The Contractor shall take all necessary precautions for the protection of the work and the safety of the public.
1.The Contractor shall be alert at all times to any and all deficiencies in the placement and mainte nance of any traffic control devices and shall take immediate action to correct any deficiencies.
2.The Contractor shall inspec t traffic control devices at least once every day the devices are in us e, but shall provide more frequent inspections during or following periods of inclement weather or at other times when more frequent inspections are warranted.
f.The Contractor may be given not ice, either written or verbal, of failure to install, replac e, remove, or maintain a traffic control device.
1.Upon notification by the Engineer, the Contractor shall respond to any site within 4 hours and take immediate steps to correct the deficiency.
2.If corrective action is not taken by the Contractor within 4 hours of the initial notice, the Engi neer shall make no payment for any traffic control devices for that day.
3.If corrective action is not taken within 4 hours, a written notice of action to be taken shall be given to the Contractor or person designated for work zone traffic control.
4.Failure to install, replac e, remove, or maintain a device within 8-hours of the initial notice may result in no payment being made for any traffic protective devices on the project for that day and on subsequent days until the requested installation, replacement, removal, or maintenance is performed. The Engineer may also suspend all other work until the problem is corrected.
g.The Department may elect at any time to correct a traffic control deficiency and bill the Contractor for all costs necessary to correct the problem.
h.The Contractor shall immedi ately notify the Engineer of any hazard or changed roadway condition that is not identified in the contract.
i.When more than one Contract or is working on the project or when consecutive projects require pr otection and control of traffic, the Engineer shall determine and notify in writing the Contractor whose responsibility it shall be to provide the protection and control of traffic.
j.Failure of the Contractor to erect and maintain traffic protective devices shall be reason to temporarily suspend the work in accordance with Subsection 108.06.
2.Posts a. Posts used to erect permanent and temporary signs shall be installed and maintained plumb, and the sign faces shall be positioned and maintained so that they face approaching traffic.
1.Stub steel posts used for erecting signs shall not be installed prior to the placement of the signs or be left in place when signs are removed unless the following conditions are met: Temporary Traffic Control Signs and Devices 422.03 - 255 - (i) Stub steel posts may be installed prior to the placement of the signs or temporarily left in place when the signs are removed. Each stub steel post shall be immediately and clearly identified by a 42 inch Reflective Cone, 36 inch (minimum) delineator post with button reflector, or other warning device acceptable to the Engineer. No payment will be made for the items used to identify the stub steel posts.
3.Permanent signs: a. The Contractor shall give the Engineer two week’s notice prior to picking up signs at the designated maintenance yards.
b.Signs shall be returned to the maintenance yards from which they were obtained, or to a location designated by the Engineer, during normal working hours.
1.Signs returned to the Department shall be in reusable condition.
2.Aluminum signs shall not be marred, damaged, bent, or contain holes other than necessary bolt holes.
4.Temporary Signs shall be post mounted. a. Signs in place no longer than 3 days may be mounted on a temporary sign support.
b.Signs on a temporary sign support shall be mounted a minimum of 1 foot (300 mm) above the roadway, unless otherwise required to be mounted at a higher height.
5.Barricades: a. The Contractor shall provide, install, maintain, relocate, and when no longer required, remove barricades and reflectorized drums at the locations shown in the contract or designated by the Engineer.
b.In applications other than on a freeway, expressway, or an interstate roadway, reflectorized drums may be used in lieu of Type II Barricades. Reflectorized drums shall be used in lieu of Type II Barricades in applications on a freeway, expressway, or an interstate roadway.
c.When approved by the Engineer or shown in the contract, 42 inch (1070 mm) reflective cones may be used in lieu of Type II Barricades or Reflectorized Drums. 42 inch (1070 mm) reflective cones shall not be used for lane-closure tapers or shifts.
6.Temporary Traffic Signal:
a.Temporary traffic signal syst ems shall be furnished, installed, operated, and maintained by the Contra ctor at the locations shown in the contract.
b.The item "Temporary Traffic Signal" shall include signal heads for all approaches to the signal. A temporary traffic signal for a single lane roadway section or bridge shall include signal heads for both ends of the single lane section and any other approaches.
c.Temporary Power Service:
1.The Contractor shall make arrangements with the local utility for power service for temporary signals in a timely manner.
422.03 Temporary Traffic Control Signs and Devices
- 256 - (2) The Contractor is required to comply with the local utility's policy for temporary power service.
3.The Contractor shall cooperate with the local utility in scheduling the installation.
4.Any delay resulting from a Contractor's untimely request to the local utility for temporary power serv ice shall not be justification for the suspension or adjustment of the working days or calendar days on a project.
d.When work is complete, the C ontractor shall remove the traffic signal.
7.Concrete Protection Barriers: a. "Install Concrete Protecti on Barrier": Concrete protection barriers will be furnished by the Department and shall be installed by the Contractor at the locations shown in the contract or designated by the Engineer. The Contractor shall obtain and return the concrete barriers to the locations indicated in the contract.
b."Concrete Protection Barrier": The Contractor shall furnish and install concrete protection barriers at the locations shown in the contract or designated by the Engineer.
c.“Relocate Concrete Protecti on Barrier”: The Contractor shall reposition the concrete protection barri ers at the same location as directed by the Engineer or as shown in the c ontract after the initial installation.
d.Adjacent ends of the barrier units shall be aligned and fastened together as directed by the Engineer.
e.The Contractor shall shim the barrier units as necessary to compensate for surfaces that are not level.
f.Concrete protection barriers that become dislodged or moved out of alignment shall be placed back in alignment as soon as practical. If the dislodged barriers are considered to be a hazard to the traveling public by the Engineer, or the barriers encroac h into the traveled lane, the barriers shall be realigned within 4 hours of the time the Contractor is notified. For each occurrence, failure to realign the barriers within the 4 hour time period will result in the assessment of a lump sum $1,000 liquidated damage assessment and the Engineer may proceed to correct the adverse conditions in a manner that is deem ed appropriate. The Contractor will also be assessed the cost incurred when the action is performed by others. This assessment has not been provided for elsewhere in the contract and shall be considered in addition to other liquidated damage assessments which are a part of the contract.
8.Temporary Rumble Strips: a. The Contractor shall furnish, install, and maintain temporary rumble strips at the locations shown in the contract or directed by the Engineer.
b.The material shall be given adequate time to harden before the rumble strips are opened to traffic.
c.Upon completion of that parti cular phase of the work requiring rumble strips, the Contractor shall remo ve the rumble strips. The Contractor Temporary Traffic Control Signs and Devices 422.03 - 257 - shall exercise the same care and consideration for traffic control during removal operations as that required for t he initial installation or replacement.
9.Vertical Panels: The Contractor shall furnish, install, and maintain vertical panels at the locations and spacing shown in the contract or designated by the Engineer. The vertical panels shall comply with the requirements shown in the MUTCD and any pertinent modifications shown in the contract. A vertical panel unit may be single or double sided (back-to-back) as required by the contract, and the supporting post shall not cover any of the reflective area of the panels.
10.Inertial Barrier System: a. This work shall include the furnishing and installation required for project phasing, and removal of sand- filled type inertial barrier systems, including filler material and object markers, in accordance with the contract or as required by the Engineer.
b.System Components:
1.The Contractor shall furnish an FHWA approved inertial barrier system that is on the Department’s Approved Products List.
2.The system shall be installed in the field as required by the manufacturer.
3.The sand or filler material for the inertial barrier system shall meet one of the material and gr aduation requirements of fine aggregate for concrete. The sand or filler material shall contain 5 to 15% (by volume) rock salt mixed with the filler material.
4.A complete set of replacement modules shall be available near the project site in the event of damage to the installed system. Damaged modules shall be replaced within 24 hours.
5.Upon completion of the work requiring the inertial barrier system, the Contractor shall remove t he system and clean the site of any debris and filler material remaining from the system.
c.Inertial barrier modules s hall be available in 200, 400, 700, 1,400, and 2,100 pound (90, 180, 3 15, 630, and 950 kg) sizes and shall consist of the following components:
1.An outer container molded in one or two pieces. The material shall be durable, weatherproof, and formulated to resist deterioration from ultraviolet rays. T he outer container shall have a minimum width of 27 inches (685 mm) at the base, 36 inches (915 mm) at the top, and a minimum height of 36 inches (915 mm). The standard color shall be yellow.
2.A lid which locks securely to the top li p of the outer container. The material shall be durable, weatherproof, and formulated to resist deterioration from ultraviolet rays. The lid shall be capable of withstanding a 200 pound (90 kg) vertical load.
3.A supporting insert which is varied to allow for different sizes of modules to support 200, 400, 700, and 1,400 pound (90, 180, 315, and 630 kg) sand weight. Care shall be taken to fill each module with the proper amount of sand as called for in the array design. The height and
422.03 Temporary Traffic Control Signs and Devices
- 258 - diameter of the inserts shall be such to ensure that the cent er of gravity of each module is at the proper elevation to control the attitude of impacting vehicles. The insert container interface shall allow free drainage of excess water contained in the sand mass.
d.An MUTCD Type I object marker shall be placed on the first inertial barrier module facing approaching traffic. The Type I object marker shall consist of nine yellow prismatic reflectors, each with a minimum dimension of 3 inches (75 mm), mounted symmetrically on a 18 inch (450 mm) black or yellow diamond panel; or a 18 inch (450 mm) yellow diamond panel of ASTM D4956 Type IV retroreflective sheeting without buttons. The object marker shall be placed approximately 2 inches (50 mm) below the top of the first module.
11.Flashing Arrow Panel:
a.The Contractor shall furnish, install, operate, and relocate mounted flashing arrow panels for use in traffic control at the locations shown in the contract. The Contractor shall remove the panels when work is complete and the Engineer has approved their removal.
b.Panel Design: (1) The minimum panel size shall be 8 feet by 4 feet (2.4 m by 1.2 m) and shall contain 22 lamps. The lamps shall be arranged to form 3 connected diamonds with the short axis of the diamonds lying on the horizontal centerline of the sign. Each side of the diamonds will form an arrowhead of 5 lamps per head. Each arrowhead shall have a minimum angle of 100 degrees.
2.The panel shall be constructed in a rigid manner such that the panel face does not flex in the vertical dimension.
3.For use on multi-lane roadways where at least one traffic lane is maintained for each direction of travel, the arrow panel shall have the capability of the following mode selections:
i.Left or right flashing arrow. (ii) Left or right sequential chevrons. (iii) Double flashing arrows. (iv) Flashing or alternating caution. (4) For use as a hazard identification marker on 2-lane highways with 1 lane closed, the flashing arrow panel shall be wired to alternately flash the two outside diamon ds or flash the 4 outside corners.
5.Minimum "on time" shall be 50% for the flashing arrow and flashing diamonds and equal intervals of 25% for each sequential phase.
c.Visibility:
1.Lamps for generator powered arrow panels shall maintain visibility out to a horizontal angle of 20 degrees.
2.Solar powered arrow panels shall maintain visibility out to a horizontal angle of 13 degrees.
3.Vertical maintained visibility shall be greater than 3 degrees. Temporary Traffic Control Signs and Devices 422.03 - 259 - (4) The lamp intensity shall be adjusted to prevent an unnecessary blinding effect and to compensate for daytime and nighttime light conditions so that the arrow panel message is legible for a distance of 1 mile (1.6 km). The intensity shall be controlled by an automatic dimmer capable of a 50% reduction in intensity when ambient light falls below 50 lux.
d.Positioning:
1.The arrow panel shall be aimed to provide for recognition throughout the range from 1,600 feet to 300 feet (488 m to 91 m) upstream of the panel.
2.For use on 2-lane highways as a hazard identification marker, the mounted arrow panel shall be located immediately in front of the hazard and behind a Type III barricade.
3.The arrow panel shall be mounted at a minimum height of 7 feet (2.1 m) from the road surf ace to the bottom of the panel.
4.The arrow panel shall be mounted such that it will remain stationary and rigid in high or gusty winds while the panel is in use.
e.Maintenance: (1) The arrow panel shall be maintained so as to operate continuously. The Contractor shall ad vise the Engineer of the person to contact in case of needed repairs or maintenance.
2.The Contractor shall always have an extra unit on the project for use as a standby unit. In the event of equipment failure resulting in an arrow panel becoming inoperative, regardless of the time of day, the Contractor shall immediately substitu te the standby unit for the inoperative arrow panel. The Contractor shall then either immediately repair or replace the defective unit.
12.Flagging: a. The Contractor shall furnish flaggers to direct traffic when construction activity occurs on or adjacent to a surface being used by the traveling public.
b.Flagging shall only be perfor med by certified flaggers. When necessitated by an emergency situatio n or for situations not reasonably expected to last for more than 15 minutes, flagging may be performed by other than certified flaggers. Flaggers must always carry a valid Flagger Certification Card.
c.The flaggers shall be properly attired with vest and head gear. They shall be provided properly installed advance warning signs, and they shall be otherwise equipped in accordance with the requirements of the contract.
d.Flaggers shall position themselves appropriately and according to accepted flagging procedures.
e.The Contractor shall be responsible for the training and certification of the flaggers employed on the project. Certification shall be according to the standards established herein and the "Guidelines for Flagger Training and Certification of Flaggers" available from the Department. Certification cards issued according to these rules by other Contractors, provided they have not ex pired, shall be considered valid.
422.03 Temporary Traffic Control Signs and Devices
- 260 - f. Flaggers shall be familiar with the contents of the Department's "Flagger's Handbook" and shall carry a copy of such publication on their person while performing the flagger duties. This publication is available from the Engineer and consider ed part of the contract.
g.In order to be certified, the prospective flagger must:
1.Be in good health with normal abilities of hearing and sight.
2.Be able to read and speak English. (3) View the 45 minute video "The Flagger." (4) Correctly answer 80% of the questions on an examination that accompanies the video.
h.Upon satisfactory completi on of the training and examination procedure, the prospective flagger sh all be issued a Flagger Certification Card by the examining Contractor.
i.The video, examination form s, Flagger Certification Cards, Flagger Certification Reports, and "G uidelines for Flagger Training and Certification of Flaggers" shal l be furnished by the Department.
13.Pilot Vehicle: a. When a pilot vehicle is required by the contract, it shall be used to lead the traffic through the restri cted section. The work shall be so coordinated that the pilot vehicle shall make a round trip in 15 minutes or less.
b.This work shall consist of providing a vehicle and driver to serve as a pilot vehicle to lead the traveling public and the Contractor's vehicles through the construction work area where 2-way traffic is restricted to only one lane.
c.Vehicle Requirements:
1.The pilot vehicle shall be properly equipped and licensed for operation on public roadways in accordance with the applicable State laws.
2.The vehicle may carry the Contractor's monogram or company insignia and shall be equipped with a rear facing, rigidly mounted sign having a fluorescent orange background (ASTM D4956 Type IV or greater sheeting) with black lettering bearing the message: "PILOT CAR---FOLLOW ME"
3.The sign shall be a MUTCD sign No. G20-4, sized at 36 x 18 inches (900 mm x 450 mm).
4.The bottom of the sign shall be mounted a minimum of 1 foot (300 mm) above the vehicle's roof.
5.The sign shall be securely covered or removed when not in use.
6.The vehicle, while in use, shall be used exclusively to lead and assist traffic movement. Temporary Traffic Control Signs and Devices 422.03 - 261 - (7) During construction, a pilot vehicle shall be kept in continuous operation. Delays to traffic movement will not be allowed for refueling, driver relief, or any other foreseeable reason.
8.The work shall be so coordinated that the pilot vehicle shall make a roundtrip in 15 minutes or less.
d.Pilot vehicle drivers shall be properly licensed and shall be familiar with and always observe the "Rules of the Road" for proper, safe, and courteous driving. Drivers will be subj ect to prosecution for all violations.
e.Pilot vehicle drivers shall be certified flaggers and must have their Flagger Certification Card in their possession at all times.
14.Tubular Post: a. The Contractor shall furnish, install, maintain, and remove reflectorized tubular posts at the loca tions shown in the contract or as directed by the Engineer.
b.Post Design: (1) The height of a tubular pos t shall be 28 inches (700 mm). The material from which the post is fabricated shall be rubber, plastic, or any other material which meets the physical test requirements and results in little or no damage to impacting vehicles. The minimum width of the post shall be 2 inches (50 mm). The predominant color of the post shall be orange, unless otherwise stated in the contract.
2.Each complete tubular post and each replacement post shall have a minimum of two 3-inch (7 5 mm) wide retroreflective white bands placed a maximum of 2 in ches (50 mm) from the top with a maximum of 6 inches (150 mm) between the bands.
3.Tubular posts that are approved for use will be shown on the Department’s Approved Products List. Tubular posts which have not been previously approved by the Department will not be permitted on the project until approved by the Engineer.
c.The tubular posts shall be sp aced at the intervals shown in the contract or as directed by the Engineer and shall be attached to the existing surface by epoxy or other suitable ad hesive or method. The adhesive shall be given adequate time to harden before the post can be attached and the area opened to traffic. The initial placement and/or replacement of the tubular posts shall be performed with extreme care and consideration for the traveling public.
d.Retroreflective sheeting whic h is no longer effective shall be replaced.
e.Tubular posts which have become dislodged due to traffic or other action shall be properly repositioned and reattached within 24 hours. Tubular posts which cannot be cleaned or which are broken shall be replaced.
f.Upon completion of that parti cular phase of the work requiring tubular post delineation, the Contractor shall remove the posts as directed by the Engineer. The Contractor shall exercise care and consideration for traffic control during initial installation, replacement and removal. The
422.03 Temporary Traffic Control Signs and Devices
- 262 - Contractor must explain this phase of traffic control to the Engineer before installation, replacement, and removal.
15.Opposing Lane Dividers: a. The Contractor shall furnish, install, and maintain reflectorized opposing lane dividers at the locations shown in the contract. When work is complete and the Engineer has approved their removal, the Contractor shall remove the reflectorized opposing lane dividers. b . D e s i g n : (1) The height of the opposing lane divider shall be 36 inches (900 mm).
2.The divider shall be fabricated from rubber or plastic.
3.The predominant color of the divider shall be orange.
4.Each opposing lane divider and each replacement divider must have back-to-back, upright, oran ge, reflective panels approximately 12 inches (300 mm) wide by 18 inches (450 mm) high. The symbol on the divider shall be 2 opposing black arrows. The reflective panel must be ASTM D 4956 Type IV retroreflective sheeting or approved equivalent.
c.Installation:
1.The opposing lane dividers shall be attached to the existing surface by an epoxy or ot her suitable adhesive or method.
2.The adhesive shall be given adequate time to harden before the divider can be attached and the road opened to traffic.
e.Maintenance:
1.Reflective panels which are no longer effective shall be replaced.
2.Lane dividers which cannot be cleaned or which are broken shall be replaced.
16.Portable Dynamic Message Boards: The Contractor shall furnish, in stall, operate, and maintain portable dynamic message boards as described in the contract. When their removal is approved by the Engineer, the C ontractor shall remove the portable dynamic message signs. Signs shall meet the text size and phase limit requirements as described in the MUTCD.
17.Install Impact Attenuator: a. The Contractor shall pick up the impact attenuator from the location designated in the contract and assemble the attenuator in accordance with the details shown in the contract. The Contractor shall transport, install, and maintain the units at the location shown in the contract or designated by the Engineer.
b.The Contractor shall perform all earthwork and provide the reinforced concrete pad (required for off-the-road installations) needed to place the unit.
c.The Contractor shall im mediately repair or replace any damaged units. A second unit will be stored with replacement cartridge sets in the Maintenance Yard designated in the contract. It will be available in the Temporary Traffic Control Signs and Devices 422.04 - 263 - event of damage to the installed system or if a second system is required while the original system is still in operation.
d.Upon completion of the work , the Contractor shall disassemble the system and return it to the location designated by the Engineer.
18.Mobile Traffic Control Operations The Contractor shall furnish and o perate the mobile traffic control operation as described in the contract.
422.04 Method of Measurement
1.Signs:
a.(1) “Sign Day” is the pay it em for permanent signs. “Sign Day” will be measured by the number of calendar days each permanent sign is in place and positioned as shown in the contract or as directed by the Engineer. Vertical Panels will be measured for payment as a permanent sign.
2.“Temporary Sign Day” is the pay item for signs furnished by the Contractor and mounted on sign supports. “Temporary Sign Day” will be measured by the number of calendar days each temporary sign is in place and positioned as shown in the contract or as directed by the Engineer. The sign support will not be measured separately.
3.“Barricade Sign Day” is the pay item for temporary signs furnished by the Contractor and mount ed on barricades. “Barricade Sign Day” will be measured by the number of calendar days each barricade sign is in place and positioned as shown in the contract or as directed by the Engineer. The barricade on which the sign is mounted on will be measured separately.
b.The quantity of sign days will be the number of signs multiplied by the number of calendar days that the respective signs are in place.
c.A calendar day for signs is defined as the 24-hour period from midnight to midnight, or any portion of it, within which the sign is installed and maintained.
d.Each sign will be paid for separately, even if more than one sign is installed on the same post or device.
2.Barricades: a. Type III barricades will be measured for payment by the number of calendar days each Type III barricade is in pl ace and positioned as shown in the contract or as directed by the Engineer. The unit is barricade-day (BDay).
b.Type II Barricades, Reflectorized Drums, and 42 inch (1070 mm) Reflective Cones will be counte d as "Barricades, Type II" and measured for payment by the number of calendar days each is in place and positioned as shown in the contract or as directed by the Engineer.
c.Payment for "Barricades, Type II", "Barricades, Type III", Reflectorized Drums, and 42 inch (1070 mm) Reflective Cones will not be made for any devices which are not kept clean and properly positioned.
422.04 Temporary Traffic Control Signs and Devices
- 264 - d. Barricades used to protect pipe culvert extensions and storage areas adjacent to an open road will not be measured directly but will be subsidiary to the appropriate bid item.
e.Barricades used to protect box culvert extensions adjacent to an open road will be measured for payment during construction of the box culvert extension. After the concrete reaches the strength that the forms may be removed, barricades used to protect the box culvert extensions adjacent to an open road will not be measured directly but will be subsidiary to the appropriate bid item.
3.Flagging: a. “Flagging” will be measured for payment for each flagger on a daily basis.
b.Operation of one flagger for 4 hours or less will be considered as one half day and operation for more than 4 hours will be considered as one full day.
c.This price shall be full compensation for furnishing properly trained, attired, and equipped flaggers; fo r furnishing, installing, maintaining, relocating and removing all flagging related signs and devices, and for all labor, tools, equipment, material, and incidentals necessary to complete the work. Temporary signs and stands for flaggers shall comply with the requirements of Temporary Sign.
4.Temporary Traffic Signal:
a."Temporary Traffic Signal" will be measured by the each for every complete installation.
b.When a traffic signal is required at a bridge or other obstruction, all signals required to clear traffic through the obstruction are counted as a single unit.
5.Concrete Protection Barrier:
a.“Concrete Protection Barrier” will be measured by the length in feet (meters) based on the 12 foot 6 inch (3.8 m) nominal length of the individual units.
b.The pay item “Relocate Concrete Protection Barrier” applies to those repositionings directed by the Engineer or shown in the contract. These relocations will be measured by the length of the concrete barriers so relocated based on the 12 foot 6 inch (3 .8 m) nominal length of the individual units.
6.Temporary rumble strips will be measured for payment by the each for the entire section of temporary rumble strips initially installed at a specific location. No direct payment will be made for rumble strips replaced.
7.The inertial barrier system will be measured by the each. 8. Flashing Arrow Panels: a. Flashing arrow panels will be measured by the each per each calendar day in use.
b.A double-faced flashing arrow panel will be counted as two units when a double-faced panel is described in the contract. Temporary Traffic Control Signs and Devices 422.05 - 265 - 9. The pilot vehicle will be measured for payment on a daily basis when actually in use. Operation for 4 hours or less shall be considered as one-half day and operation for more than 4 hours shall be considered as a full day.
10.Tubular posts will be measured by the each. 11. Opposing lane dividers will be measured by the each. 12. Temporary Glare Screen will be measured by the length in linear feet (meters) of base rail initially installed, complete with blades.
13.“Portable Dynamic Message Signs” will be measured by the each per day for the number of calendar days each sign is in place and operating.
14."Install Impact Attenuator" will be measured by the each.
15.“Replacement Module” is the pay item for inertial barrier system replacement modules and the unit of measurement is each (EA).
16.“Relocate Inertial Barrier Syst em” is the pay item for moving the inertial barrier system to a new location after initial installation and operation.
17.The mobile traffic control operation shall be measured for payment on a daily basis for each day that the operation is in use. Operation for 4 hours or less will be considered as one-half day and operation for more than 4 hours shall be considered as a full day.
18.Payment for any traffic control device paid for by the day (excluding “Flagging”) will not extend beyond the last working day or calendar day allowed by the contract. Payment wi ll be made for any approved extension of the contract time allowance. The traffic control devices paid by the day that are required as determined by the Engineer, shall remain in service at no cost to the Department.
19.“Install Traffic Control Taper” is the pay item for the equipment, labor and incidentals for installing and removing traffic control taper, including all Reflectorized Drums, Flagger, and Flashing Arrow Panel and other devices required for the installa tion and measured by the Each. This item will be measured each time the traffic control taper is relocated to a new location after initial installation.
422.05 Basis of Payment
1.Pay Item Pay Unit S i g n D a y E a c h ( e a ) Temporary Sign Day Each (ea) B a r r i c a d e S i g n D a y E a c h ( e a ) Barricade, Type II Barricade-Day (BDay) Barricade, Type III Barricade-Day (BDay) F l a g g i n g D a y ( d ) Temporary Traffic Signal Each (ea) Install Concrete Construction Barrier Linear Foot (LF) [Meter (m)] Concrete Protection Barrier Linear Foot (LF) [Meter (m)]
422.05 Temporary Traffic Control Signs and Devices
- 266 - Temporary Rumble Strip Each (ea) Inertial Barrier System Each (ea) Flashing Arrow Panel Day (d) Furnishing & Operating Pilot Vehicle Day (d) Opposing Lane Divider Each (ea) Contractor Furnished Sign Day Each (ea) Mobile Traffic Control Operation Day (d) Temporary Glare Screen Linear Foot (LF) [Meter (m)] Portable Dynamic Message Boards Day (d) Tubular Post Each (ea) Install Impact Attenuator Each (ea) Relocate Inertial Barrier System Each (ea) Replacement Module Each (ea) Relocate Concrete Protection Barrier Linear Feet (LF) [Meter (m)] Install Traffic Control Taper Each (ea)
2.Signs:
a.If signs are not returned or are returned damaged, and the damage is beyond reasonable “wear and tear” and the damage was caused by the Contractor, then the Contractor shall be charged the value of the missing or damaged items. These charges shall be deducted from monies due the Contractor upon final payment.
b.Payment will not be made for those calendar days when signs are not in use, such as for folded signs, temporarily covered signs, or signs temporarily positioned so that the mess age is not readable by the traveling public.
c.Temporary Signs:
1.Temporary Signs which are required for “Flagging” are subsidiary to “Flagging”.
2.The “Temporary Sign” pay item will be full compensation for furnishing the “Temporary Sign” and for “Temporary Sign” support, transportation, original installation, any required relocation and maintenance of any and all “Temporary Signs”, for removal of all “Temporary Signs”, and for all equipment, tools, labor, and incidentals necessary to complete the work.
3.a. The pay item "Barricade, Type II" is used to pay for three items ("Barricades, Type II", "42 inch (1070 mm) Reflectorized Cones", and "Reflectorized Drums").
b."Barricades, Type II", which includes "42 inch (1070 mm) Reflectorized Cones", and "Reflectorized Drums", will be paid for as an "established" contract unit price item. The established unit price is identified on the "Schedule of Items" shown in the Proposal. Temporary Traffic Control Signs and Devices 422.05 - 267 - 4. Payment for vertical panels includes all posts, brackets, or hardware necessary to install and maintain the vertical panel units.
5.Temporary Traffic Signals: a. The Contractor shall be re sponsible for the utility costs to install or relocate the power service for temporary traffic signals.
b.The Contractor shall al so pay for power to operate the temporary signals. However, costs for power to operate a temporary signal that replaces an existing operating signal shall be paid by the jurisdiction responsible for the power costs of the permanent signal.
c.Direct payment will not be made for power costs. Power costs shall be considered subsidiary to the temporary traffic signal.
6.All warning lights will not be measured for payment but shall be considered subsidiary to the items fo r which direct payments are provided.
7.No direct payment will be made for opposing lane dividers repositioned, reattached, replaced or for their removal.
8.The repositioning, reattachmen t, removal, or replacement of a tubular post is subsidiary to the pay item "Tubular Post."
9.Inertial Barrier Systems:
a.Payment for inertial barrier systems and replacement modules shall include all modules required to build and maintain the required array of barrels, sand filler material, salt, object markers, installation, maintenance, earthwork required for placing the system on flat ground, removal of the system, and cleaning of the site.
b.“Relocate Inertial Barrier” will be paid for each relocation.
10.Payment is full compensation for all work described in this Section. - 268 - SECTION 423 -- PERMANE NT PAVEMENT MARKING
423.01 Description
1.This work shall consist of fu rnishing and installing retroreflective preformed pavement markings in accord ance with these Specifications and in conformance to the dimensions and lines shown in the contract or established by the Engineer. This Specification covers the following permanent pavement marking materials and application methods:
a.Thermoplastic Pavement Marking.
b.Thermoplastic Pavement Marking, Type Spray.
c.Permanent Pavement Marking, Paint and Beads.
423.02 Material Requirements
1.Thermoplastic Pavement Marking Materials:
a.The composition minimum perc entages by weight are shown in Table 423.01. Table 423.01 Minimum Composition Requirements White Minimum Percentage Yellow Minimum Percentage Binder 18 18 TiO 2 (Type 2 Rutile) 8 N/A Glass Beads 35 35 Yellow Pigment N/A 5.0
b.The alkyd binder shall consist of maleic modified medium lead chromate pigment with a minimum of 50% lead-free content.
c.The alkyd binder shall consist of maleic modified rosin ester and not more than 20% petroleum derived resin.
d.The yellow pigment used shall be a heat established medium lead pigment with zero percent lead content.
e.Physical Requirements:
1.Color:
i.The white thermoplastic shall be pure white and free from any tint. When tested with a Colorimeter, such as a Gardner Color Difference Meter, the material shall not show deviations from a magnesium oxide color standard that are great er than shown in Table 423.02.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 284–301 of 1,048.