GUIDELINES FOR DESIGN OF LIGHT RAIL GRADE CROSSINGS
The information in this report has been obtained from experiences of transportation engineering professionals and research. The objective of the study was to review traffic engineering experiences and procedures for light rail transit (LRT) systems throughout North America, and develop guidelines for the design of at-grade light rail crossings. The main conclusions of the study focus on traffic controls and are as follows: (1) Direct control of motor vehicle traffic is more effective than warning or advisory signs. An exception may be where low-volume, private roadways interface with low-speed LRT operations. In these situations, wayside warning devices in concert with audible warning devices may be sufficient. (2) Signal priority or preemption can facilitate and enhance safety of LRT operations. Priority and preemption systems are further enhanced when integrated with traffic signal coordination and other measures. (3) Side-of-street LRT alignments create excessive operating conflicts where there are frequent crossings. (4) Direct traffic control and/or improved geometric design of minor crossings and driveways, particularly for side-of-street running, is highly beneficial. Elimination or minimization of "on-line" mid-block alleys, driveways, and minor street access is an effective means to reduce conflicts. (5) "Mixed-flow", light rail vehicle and autos sharing the street, reduces the efficiency of both modes. (6) Where employed, gates or traffic signals should be installed following such design guidelines as the AREA Manual of Railway Engineering and relevant local guidelines (e.g., California Public Utilities Commission General Order 143-A Draft Revision 6/89). Additional conclusions are presented in the report.
- An Informational Report prepared by ITE Technical Council Committee 6Y-37, chaired by Hans W. Korve.
Institute of Transportation Engineers (ITE)Washington, DC United States
- Publication Date: 1992-2
- Features: Appendices; Figures; References; Tables;
- Pagination: 92 p.
- TRT Terms: Alignment; Bus priority; Design; Gates; Geometric design; Guidelines; Light rail transit; Light rail transit grade crossings; Railroad grade crossings; Traffic conflicts; Traffic control; Traffic safety; Traffic signal control systems; Traffic signal preemption; Traffic signals; Vehicle mix
- Geographic Terms: North America
- Subject Areas: Design; Highways; Operations and Traffic Management; Planning and Forecasting; Public Transportation; Railroads; Terminals and Facilities; I21: Planning of Transport Infrastructure; I73: Traffic Control;
- Accession Number: 00625368
- Record Type: Publication
- Report/Paper Numbers: IR-063
- Files: TRIS
- Created Date: Nov 20 1993 12:00AM