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40 Safety Rest Areas Current Guide The current AASHTO Roadway Lighting Design Guide (AASHTO 2018) discusses safety rest areas and gives recommendations for lighting levels within the rest area, on entrance roads, and in parking areas. Requirements for minimizing glare are also included in the guide. Additional Considerations for LED Sources The lighting levels with safety rest areas would not be modified on the basis of the use of LEDs. Following are some considerations that might be useful: â¢ Consideration of adaptive lighting at these facilities is suggested, with dimming occurring when activity is reduced. Dimming could occur on the basis of the lighting level for major activities versus that for minor activities. Roadway and gore areas should be dimmed to the same levels as the mainline roadway lighting. Motion sensors for public areas off the roadway may be considered. The use of dimming, however, must be specific to the area, DOT preferences, expected use, and security concerns for the area. â¢ Various CCT sources could be used to delineate areas within the rest area (e.g., vending, pedestrian paths) to assist in identification and wayfinding. â¢ Glare should be limited to the mainline roadway so that the driver on the mainline does not see an increase in the veiling luminance ratio prescribed in the current AASHTO guide. Key Issues for Safety Rest Areas â¢ Consider adaptive lighting for safety rest areas if deemed appropriate by the owner. â¢ Consider pedestrian and vehicle flow as part of the design. â¢ Assess and design to mitigate any glare to the mainline roadway. C H A P T E R 8