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Extension of Safety Assessment Tool for Construction Work Zone Phasing Plans

Project Details
STATUS

Completed

START DATE

12/01/16

END DATE

08/31/18

RESEARCH CENTERS InTrans, SWZDI
SPONSORS

Smart Work Zone Deployment Initiative

Researchers
Principal Investigator
Henry Brown

University of Missouri - Columbia

Co-Principal Investigator
Carlos Sun
Co-Principal Investigator
Praveen Edara

University of Missouri-Columbia

Student Researcher(s)
Roozbeh Rahmani

About the research

Engineering practitioners must balance safety and mobility when evaluating different construction phasing alternatives for highway work zones. There is a need for practitioner guidance and practical tools to assess work zone safety impacts as such resources are currently lacking. The objective of the study was to extend a structured safety assessment tool that was previously developed for freeways, expressways, and rural two-lane highways to include other facilities such as arterials, signalized intersections, unsignalized intersections, multi-lane highways, and ramps. Using Missouri data, this study introduces five new crash prediction models for work zones on urban multi-lane highways, arterials, ramps, signalized intersections, and unsignalized intersections. All the work zone models in this report are proposed for the first time. These work zone models are implemented in a user-friendly spreadsheet tool that automatically selects the appropriate model based on user input. The tool predicts crashes by severity, and computes the crash costs for each construction phasing alternative.

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