Assessing the Economic Impact of Speed Limit Changes on Safety and Mobility in California

Musabbir, Sarder Rafee; Zhang, Michael; University of California, Davis. Institute of Transportation Studies; University of California, Davis. Department of Civil and Environmental Engineering

doi:10.7922/G2NK3CCP

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Assessing the Economic Impact of Speed Limit Changes on Safety and Mobility in California

2023-06-01
By Musabbir, Sarder Rafee ; Zhang, Michael

[PDF-1.98 MB]

English

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Details:

Creators:

Musabbir, Sarder Rafee ; Zhang, Michael

Musabbir, Sarder Rafee ; Zhang, Michael Less -
Corporate Creators:

University of California, Davis. Institute of Transportation Studies ; University of California, Davis. Department of Civil and Environmental Engineering

University of California, Davis. Institute of Transportation Studies ; University of California, Davis. Department of Civil and Environmental Engineering Less -
Corporate Contributors:

University of California Institute of Transportation Studies
Subject/TRT Terms:

[+]

Crash Data Economic Analysis Mathematical Models Operating Costs Traffic Safety Variable Speed Limits
Publication/ Report Number:

UC-ITS-2021-36
DOI:

https://doi.org/10.7922/G2NK3CCP
Resource Type:

Tech Report
Geographical Coverage:

California ; United States

California ; United States Less -
Edition:

Final Research Report (October 2020 – December 2021
Corporate Publisher:

University of California Institute of Transportation Studies
Abstract:

This project estimates the safety and mobility impact of changing speed limits on California highways. The safety impact is estimated using statistical models to predict the change in the frequency of all crashes and fatal-or-severe crashes that would result by varying the design speed (85th percentile speed). Statewide crash and traffic data (from the Statewide Integrated Traffic Records System, the Highway Safety Information System, and the Performance Measurement System) were combined to develop a balanced and sampled dataset for the statistical models. Three different increases in differential speed limits (DSLs; whereby trucks and cars have different speed limits) lead to increases in the frequency of all crashes, including fatal and severe crashes, for all of the classified segments (urban, rural, and different design speed segments). The operational condition (speed, travel time, delay) is tested using seven simulation segments with urban-rural classification. Four different DSL scenarios and four uniform speed limit (USL) scenarios are tested for each of the simulation segments. The results show a decrease of travel time but an increase of fuel consumption as the speed limits get higher.
Format:

PDF
Funding:

UC-ITS-2021-36
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:27c67289ef69ff498f34eff059ec95be974d1a743eb8e1a9fd5a2223969ccc07
Download URL:

https://rosap.ntl.bts.gov/view/dot/68869/dot_68869_DS1.pdf
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Assessing the Economic Impact of Speed Limit Changes on Safety and Mobility in California

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