Reconsidering the Impact of Access Spacing on Crash Risk

Xie, Kun; Yang, Hong; Dong, Xiaomeng; Old Dominion University; Virginia Transportation Research Council (VTRC)

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Reconsidering the Impact of Access Spacing on Crash Risk

2024-11-01
By Xie, Kun ; Yang, Hong ; Dong, Xiaomeng

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English

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Details:

Creators:

Xie, Kun ; Yang, Hong ; Dong, Xiaomeng

Xie, Kun ; Yang, Hong ; Dong, Xiaomeng Less -
Corporate Creators:

Old Dominion University ; Virginia Transportation Research Council (VTRC)

Old Dominion University ; Virginia Transportation Research Council (VTRC) Less -
Corporate Contributors:

Virginia. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration

Virginia. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Access Control (Transportation) Highway Design Risk Management Spacing Traffic Crashes Traffic Safety
Publication/ Report Number:

FHWA/VTRC 25-R8
Resource Type:

Tech Report
Geographical Coverage:

United States ; Virginia

United States ; Virginia Less -
Edition:

Final Report
Corporate Publisher:

Virginia. Department of Transportation
Abstract:

The spacing of access points is one of the most critical elements in access management. This project aims to investigate the effect of access spacing on crash risk using scientifically rigorous statistical methods and to examine VDOT’s current access spacing standards. Specifically, the study focuses on unsignalized access types located on principal arterials, minor arterials, and collectors. A comprehensive literature review was conducted, examining the directionality and magnitude of the safety impacts of access spacing, the selection of exposure indicators, and the statistical methods employed. An experiment was designed to compare the crash outcomes of 33 control sites with large access spacing and 33 experimental sites with short access spacing. Random effects negative binomial (RENB) models were developed and identified as the appropriate approach to explore the safety impact of access spacing while accounting for exposure indicators and other factors such as the number of turn lanes and sight obstructions.
Format:

PDF
Funding:

122313
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha-512:9180f9b6a94ca8263253b1aa2fd9a9a62ec48cde49aaf93d29824cf610bdda87e9848469b7ca30368f6bc82348d7c542c5325835ad4460ce4385c62e16b5e289
Download URL:

https://rosap.ntl.bts.gov/view/dot/78948/dot_78948_DS1.pdf
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Reconsidering the Impact of Access Spacing on Crash Risk

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