Configurations

Lighting assemblies specified by Item 610 use three typical configurations based on the purpose of the lighting:
  • Continuous lighting typically uses 50' light poles with either 400 watt HPS or the equivalent size LED. This configuration can light a roadway to minimal freeway levels up to 60' across the roadway from the luminaire.
  • Safety lighting typically uses 40' light poles with either 250 watt HPS or the equivalent size LED. This configuration can light a roadway to minimal levels up to 50' across the roadway from the luminaire.
  • Underpass lighting is typically mounted to the bridge structure at 16' mounting height, with either 150 watt HPS or the equivalent size LED.
TxDOT roadway illumination assemblies are designated by the RIP standards with the codes shown in Figure 5-1.
Explanation of roadway illumination assemblycodes. (click in image to see full-size image)
Figure 5-1. Explanation of roadway illumination assembly codes.