Safety Performance Analysis of TSMO: A Practical Approach for Assessing Safety Service Patrol Effects on Secondary Crashes

Porter, Richard J.; Gooch, Jeff; Dunn, M. E.; United States. Federal Highway Administration. Office of Safety

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Safety Performance Analysis of TSMO: A Practical Approach for Assessing Safety Service Patrol Effects on Secondary Crashes

2019-11-01
By Porter, Richard J. ; Gooch, Jeff ; Dunn, M. E.

[PDF-1.79 MB]

English

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Creators:

Porter, Richard J. ; Gooch, Jeff ; Dunn, M. E.

Porter, Richard J. ; Gooch, Jeff ; Dunn, M. E. Less -
Corporate Creators:

United States. Federal Highway Administration. Office of Safety
Contributors:

Roche, Jerry
Corporate Contributors:

VHB/Vanasse Hangen Brustlin, Inc.
Subject/TRT Terms:

[+]

Incident Management Performance Measurement Safety Performance Safety Service Patrols Secondary Crashes Traffic Incident Management Traffic Incidents Traffic Safety
Publication/ Report Number:

FHWA-SA-19-042
Resource Type:

Tech Report
Geographical Coverage:

United States
Contracting Officer:

Roche, Jerry
Corporate Publisher:

United States. Federal Highway Administration. Office of Safety
Abstract:

The Federal Highway Administration (FHWA) Office of Safety, in cooperation with the Highway Safety Manual (HSM) Implementation Pooled Fund Study, recently completed a safety analysis needs assessment for TSMO. The safety analysis needs assessment characterized the current state of practice, knowledge, and skills for quantifying the safety performance effects of TSMO. It also identified gaps in the existing body of knowledge and corresponding needs, which will provide the foundation for future research activities and advancements in practice. One group of needs focused on exploring sub-annual safety data collection and analysis methods to more effectively address the dynamic conditions under which TSMO strategies operate. This document presents one such sub-annual analysis method: a probabilistic model of crash occurrence to estimate the extent to which strategies that reduce primary incident clearance times affect the potential for secondary crashes. The analysis method is presented in the context of evaluating the secondary crash effects of safety service patrols (SSPs). The result of the analysis is a benefit/cost (B/C) ratio based on the expected change in secondary crash costs and the anticipated costs of SSP operation. The document also contains an example application of the 10-step approach based on a previously published analysis of an SSP program in Indiana. Because the SSP effects on secondary crashes are derived from reductions in traffic incident clearance times, the method can also be extended to other TIM tactics or functions that are aimed at reducing incident clearance times.
Format:

PDF
Funding:

DTFH61-05-D-00024
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:184a144c15109de64cd154023d38f47b7274cad1c3587e0fcd8770b7524f11dc
Download URL:

https://rosap.ntl.bts.gov/view/dot/55635/dot_55635_DS1.pdf
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Safety Performance Analysis of TSMO: A Practical Approach for Assessing Safety Service Patrol Effects on Secondary Crashes

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