Part-time shoulder use is a congestion relief strategy that allows use of the left or right shoulders as travel lanes during some, but not all, hours of the day.
The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 2: Conduct of Research Report describes the development of crash prediction models for freeways with PTSU operation.
Supplemental to the document is a Freeway Analysis Tool, which includes BOS data, S D PTSU Data, and a Prediction Tool, as well as NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 1: Informational Guide and Safety Evaluation Guidelines.
Table of Contents
|Chapter 1: Introduction||1-2|
|Chapter 2: Literature Review||3-14|
|Chapter 3: Modeling Approaches||15-21|
|Chapter 4: Project Database||22-53|
|Chapter 5: HSM Predictive Model||54-112|
|Chapter 6: Crash Severity and Crash Type Distributions||113-145|
|Chapter 7: Advanced Crash Prediction Models||146-176|
|Chapter 8: Supplemental Safety Findings||177-215|
|Chapter 9: Conclusions||216-219|
|Appendix A: Data Collection Procedures Guide||226-240|
|Appendix B: Database Dictionary||241-269|
|Appendix C: Ohio Crash Assignment Rules||270-273|
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