681511.04 ——————————————————————————————————————Pay Item Pay Unit——————————————————————————————————————Remove, reset, relay, adjust, install, modify, reconstruct, Each, Linear foot, Square yard, relocate existing (Item or standard) Cubic yard, or Lump sum—————————————————————————————————————— SECTION 511—ALLAYING DUST
511.01 Description
This work shall consist of applying either water, calcium chloride, or both on areas designated by the Engineer for the purpose of controlling or allaying the release of nuisance dust from construction oper - ations.
511.02 Materials
Calcium chloride shall conform to Section 239. Water to control dust shall be potable or with the Engineer’ s approval may be from other sources provided it is clear, clean, and free from oil, acid, salt, alkali, organic matter, or other deleterious substances.
511.03 Procedures
The Contractor shall furnish a truck(s) equipped with a water tank having a capacity of at least 1,000 gallons and pumps for furnishing, loading, and applying water to the roadway. Equipment and operators shall be available at all times. The Contractor shall apply calcium chloride at the rate specified on the plans or directed by the Engineer. The Contractor shall plan and prosecute the work so as to expedite completion of the pavement structure or other dust generating activities as soon as is practicable.
511.04 Measurement and Payment
Allaying dust will be measured in hours or tons and will be paid for at the contract unit price per hour based on the time the truck is in actual service on this work or at the contract unit price per ton of calcium chloride actually applied in the work. Loading time for water allowed for payment shall be not more than 30 minutes per 1,000 gallons of water. Truck hours shall be evidenced by daily time reports submitted by the Contractor and approved by the Engineer. The price shall apply to and include furnishing and applying water and calcium chloride. When in-place base material is used as a riding surface to maintain traffic or as a haul route, truck hours or tons of calcium chloride used for allaying dust will be paid for in accordance with the provisions herein. 682511.04 Payment will be made under: —————————————————Pay Item Pay Unit—————————————————Allaying dust Hour or Ton————————————————— SECTION 512—MAINTAINING TRAFFIC
512.01 Description
This work shall consist of maintaining traffic and protecting workers through temporary work areas, maintaining public and private entrances and mailbox turnouts, constructing and obliterating temporary traffic Diversions, providing positive guidance to the traveling public within the limits of the work area and over approved traffic Detours. All work shall be in accordance with the VWAPM, the MUTCD, and the Contract, as directed by the Engineer.
512.02 Materials
a.Materials salvaged from the roadway shall be used in the maintenance of traffic insofar as possible. Material shall conform to the applicable specifications for the intended work or use.
b.Signalization, barricades, channelizing devices, safety devices, and pavement markings shall conform to the applicable specification requirements in Division VII of the Specifications and the VWAPM except where otherwise indicated. Retroreflective surfaces shall conform to Sections 235, 238, 247, and 702 as applicable.
c.Temporary pavement markers shall conform to Section 235.
d.Flexible temporary pavement markers (FTPMs) shall consist of products from the Materials Division Approved Products List 22. All FTPMs shall be new. FTPMs are suitable for use one year after the date of receipt when stored in accordance with the manufacturer’ s recommendations.
e.Temporary (Construction) pavement markings shall conform to Section 246.
f.Temporary (Construction) signs for traffic control during construction, maintenance, permits, utility, and incident management activities shall have retroreflective sign sheeting in accordance with Sections 247 and 701, and shall be installed in accordance with Section 701. Sign substrates for rigid temporary (construction) signs mounted on posts and temporary (construc - tion) sign panels for overlays shall be either fabricated of aluminum at least 0.080-inches thick, conforming to Section 229.02(a), or one of the following from the Traffic Engineering Division’ s Approved Products List: 0.4-inch-thick corrugated polypropylene; 0.4-inch-thick corrugated poly - ethylene plastic; or 0.079-inch-thick aluminum/plastic laminate. Sign substrates shall be smooth, flat, and free of metal burrs or splinters. Sign substrate materials for signs mounted on drums, Type 3 barricades, and portable sign stands shall be as specified below and shall be the same material that was used when the device was tested and found to be in compliance with the requirements of National Cooperative Highway Research
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 709–709 of 1,065.