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Turner-Fairbank Highway Research Center

 
 
 
 
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NCHRP Research Results Digest 318: An Expert System for Recommending Speed Limits in Speed Zones

Product Type

Technical Summary

Author

NCHRP

Date

May-07

Abstract

The digest is based primarily on the nal report for NCHRP Project 3-67, Expert System for Recommending Speed Limits in Speed Zones (available from the project description page of the TRB website: http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=821). The project reviewed current literature on guidelines, criteria, and procedures used for setting speed limits in speed zones in the United States and experience with use of XLIMITS, USLIMITS, and other existing speed-limit expert systems. A group of subject-matter experts engaged in setting and enforcing speed limits was convened to provide underlying decision rules for the expert system. The software application was developed with consideration of user needs and requirements for long-term management and maintenance of the expert system. (The application can be accessed through the Internet at http://www2.uslimits.org and is available for download and installation on an Internet server from the TRB website at http://www.trb.org/news/blurb_detail.asp?id=7568.)

Link To Technical Summary

NCHRP Research Results Digest 318: An Expert System for Recommending Speed Limits in Speed Zones

Keywords

Decision support systems
Expert systems
Operating efficiency
Primary highways
Speed limits
Speed zones
Traffic safety


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