Art. 880.01 Light Emitting Diode (LED) Signal Head SIGNAL HEADS SECTION 880. LIGHT EMITTING DIODE (LED) SIGNAL HEAD AND OPTICALLY PROGRAMMED LED SIGNAL HEAD
880.01 Description. This work shall consist of furnishing and installing a light
emitting diode (LED) signal head or an optically programmed LED signal head.
880.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Light Emitting Diode (LED) Signal Head and Optically Programmed LED Signal Head ............................................ 1078.01 CONSTRUCTION REQUIREMENTS
880.03 Installation. The signal head shall be installed on a post, bracket,
span wire, or mast arm as shown on the plans. Each signal face shall be pointed in the direction of the approaching traffic it is to control and be aimed to have maximum effectiveness for an approaching driver located at a distance from the stop line equal to the normal distance traversed while stopping. The optically programmed signal face shall be veiled according to visibility requirements at the direction of the Engineer. The size of each signal lens shall be 12 in. (300 mm). During construction and until the installation is placed in operation, all signal faces, including any traffic signal backplate, shall be completely covered with an opaque material. The covering material shall be securely fastened so it will not be disturbed by normal inclement weather or wind. The color of the covering materials shall be other than black and shall differentiate the signal as being covered.
880.04 Basis of Payment. This work will be paid for at the contract unit price
per each for SIGNAL HEAD, LED or OPTICALLY PROGRAMMED SIGNAL HEAD, LED of the type specified, and of the particular kind of material, when specified. A signal head with both standard and optically programmed signal faces will be paid for as a COMBINATION SIGNAL HEAD, LED. The type specified will indicate the number of signal faces, the number of signal sections in each signal face, and the method of mounting. Traffic Signal Backplate Art. 882.03 SECTION 881. LIGHT EMITTING DIODE (LED) PEDESTRIAN SIGNAL HEAD
881.01 Description. This work shall consist of furnishing and installing a light
emitting diode (LED) countdown pedestrian signal head.
881.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Light Emitting Diode (LED) Pedestrian Signal Head .......................... 1078.02 CONSTRUCTION REQUIREMENTS
881.03 Installation. The pedestrian signal head shall be installed on a post or
bracket as shown on the plans. Each pedestrian signal face shall be aimed to provide maximum visibility at the beginning of the controlled crossing. All pedestrian signal faces at an intersection shall be of the same type and same display. During construction and until the installation is placed in operation, all pedestrian signal faces shall be completely covered with an opaque material. The covering material shall be securely fastened so it will not be disturbed by normal inclement weather or wind. The color of the covering material shall be other than black and shall differentiate the pedestrian signal faces as being covered.
881.04 Basis of Payment. This work will be paid for at the contract unit price
per each for PEDESTRIAN SIGNAL HEAD, LED COUNTDOWN, of the particular kind of material, when specified, and of the type specified. The type specified will indicate the number of faces and the method of mounting. SECTION 882. TRAFFIC SIGNAL BACKPLATE
882.01 Description. This work shall consist of furnishing a traffic signal
backplate and attaching it to a traffic signal face.
882.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Traffic Signal Backplate ..................................................................... 1078.03 CONSTRUCTION REQUIREMENTS
882.03 Installation. The traffic signal backplate shall be securely attached to
a traffic signal face with noncorrosive bolts, locknuts, and washers. At least one bolt shall be used on each side of a signal section in contact with the backplate.
Referenced in this section
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 755–756 of 1,217. View official source ↗