User:Hoskir/Revision Request 4254
copy 901.7.5
901.7.5 Underpass Lighting
Underpasses over 75 ft. long, measured at right angles to the structure, are lighted with underpass luminaires when necessary to maintain the continuity of existing or proposed lighting. If roadway lighting units positioned near each portal provide sufficient light to penetrate the underpass and maintain the same intensity of illumination or uniformity ratio as is used on the approach roadways, the underpass luminaires are not used.
copy 901.7.6
901.7.6 High Mast Lighting
High mast lighting is principally used at complex interchanges and lights a large area by a group of luminaires mounted in a fixed orientation at the top of a tower, generally 80 ft. or taller. The district must authorize high mast lighting. The request for high mast lighting conceptual approval is to be included with the lighting warrants. Data supporting the selection of tower height, tower location and type of luminaires is to be included with the preliminary lighting plan. Where high mast lighting is used at complex interchanges, adaptation lighting is recommended for each section where vehicles enter and leave the interchange.
The district is responsible for the design of the tower foundation and the structure above the foundation for inclusion in the project plans.