Safety Impacts and Other Implications of Raised Speed Limits on High-Speed Roads

National Academies of Sciences, Engineering, and Medicine

doi:10.17226/22048

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Safety Impacts and Other Implications of Raised Speed Limits on High-Speed Roads

(2006)

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TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 90: Safety Impacts and Other Implications of Raised Speed Limits on High-Speed Roads examines how safety, economic, environmental, and commercial conditions on high-speed roadway may be impacted by a change in the speed limit. Safety-related analyses included in the report were based on a comprehensive framework of the disaggregate relationships between speed limits, driver speed choices, crash occurrence, and crash severity. An expanded summary of the report has been published as NCHRP Research Results Digest 303.

Contributor(s): National Academies of Sciences, Engineering, and Medicine; Transportation Research Board; National Cooperative Highway Research Program

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Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2006. Safety Impacts and Other Implications of Raised Speed Limits on High-Speed Roads. Washington, DC: The National Academies Press. https://doi.org/10.17226/22048.

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Publication Info

8.5 x 11 | DOI: https://doi.org/10.17226/22048

Chapters		skim
Safety Impacts and Other Implications of Raised Speed Limits on High-Speed Roads	1-1
TRB Disclaimer	2-2
About the National Academies	3-3
Contents	4-7
Acknowledgements	8-8
Abstract	9-9
Executive Summary	10-16
1 Introduction	17-19
2 Literature Survey	20-51
3 Project Survey Results and Analysis	52-81
4 Project Data Analyses	82-140
5 Summary, Conclusions and Recommendations	141-152
References	153-166
A Questionnaire Used in Survey of State DOTs	167-170
B Model of Attitudes Towards Speed Limit Level	171-172
C Estimating Speed Variables from Orange County Traffic Detector Data	173-176
D Speed Choice in Northwest Washington State	177-183
E Synthetic Speed Choice Model Data	184-186
F Crash Occurrence Models Using Unclustered HSIS Data	187-194
G Simple Crash Rate Change Model Using HSIS Data	195-197

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