详情

Practitioners’ Guide for Lighting at Innovative Intersections/Interchanges, including Roundabouts

项目名称：	Practitioners’ Guide for Lighting at Innovative Intersections/Interchanges, including Roundabouts
摘要：	Innovative intersections and interchanges are junctions of two or more roads that do not use traditional intersection or interchange layouts. Examples include diverging diamonds, restricted crossing U-turns, displaced left turns, and roundabouts. Most innovative intersections/interchanges installed in the United States have roadway lighting, in part because lighting is supported by Federal Highway Administration’s (FHWA’s) Alternative Intersection and Interchange Report, and NCHRP Report 672: Roundabouts: An Informational Guide, second edition. Lighting, however, adds significantly to construction and maintenance costs, which can be a barrier to constructing roundabouts and other innovative intersections/interchanges. Furthermore, lighting can be a barrier in settings where communities are concerned about light pollution. Research is needed to help practitioners determine (1) under what conditions lighting is justified at roundabouts and other innovative intersections/interchanges and (2) at locations where lighting is justified, what are the best lighting design practices. The objective of this project is to develop a practitioners’ guide for lighting at innovative intersections/interchanges, including roundabouts that (1) documents quantitative safety benefits associated with lighting for motorists and vulnerable road users (e.g., motorcyclists, pedestrians, bicyclists) at innovative intersections/interchanges; (2) establishes evidence-based criteria for determining whether or not to install lighting; and (3) identifies best practices, noteworthy considerations, and emerging approaches for lighting design at innovative intersections/interchanges, including roundabouts..
状态：	Proposed
资金：	500000
资助组织：	National Cooperative Highway Research Program；American Association of State Highway and Transportation Officials (AASHTO)；Federal Highway Administration
项目负责人：	Retting, Richard A
开始时间：	20221010
主题领域：	Design；Highways；Operations and Traffic Management；Safety and Human Factors