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. Art. 882.04 Directional Louver
882.04 Basis of Payment. This work will be paid for at the contract unit price
per each for TRAFFIC SIGNAL BACKPLATE, of the type specified, and of the particular kind of material, when specified. SECTION 883. DIRECTIONAL LOUVER
883.01 Description. This work shall consist of furnishing and installing a
directional louver for a 12 in. (300 mm) signal lens in the signal heads.
883.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Directional Louver .............................................................................. 1078.04 CONSTRUCTION REQUIREMENTS
883.03 Installation. The directional louver shall provide an angle of cutoff on
each side of the center axis of the light beam as follows. Type A 0 to 6 degrees Type B 7 to 10 degrees Type C 11 to 14 degrees The directional louver shall be installed inside the signal visor in front of the signal lens and secured in place with a minimum of two metal screws.
883.04 Basis of Payment. This work will be paid for at the contract unit price
per each for DIRECTIONAL LOUVER, of the type specified. When used with a 8 in. (200 mm) lens, this work will be paid for at the contract unit price per each for DIRECTIONAL LOUVER, of the type specified. DETECTION SECTION 885. INDUCTIVE LOOP DETECTOR
885.01 Description. This work shall consist of furnishing and installing an
inductive loop detector.
885.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Inductive Loop Detector ..................................................................... 1079.01 CONSTRUCTION REQUIREMENTS
Referenced in this section
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 756–757 of 1,217. View official source ↗