Reconsidering the Impact of Access Spacing on Crash Risk

Xie, Kun; Yang, Hong; Dong, Xiaomeng

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Reconsidering the Impact of Access Spacing on Crash Risk

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

File Language:

English

Details

Creators:

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

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

Virginia. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA/VTRC 25-R8
Resource Type:

Tech Report
Geographical Coverage:

United States ; Virginia
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
Download URL:

https://rosap.ntl.bts.gov/view/dot/78948/dot_78948_DS1.pdf
File Type:

[PDF - 9.60 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:9180f9b6a94ca8263253b1aa2fd9a9a62ec48cde49aaf93d29824cf610bdda87e9848469b7ca30368f6bc82348d7c542c5325835ad4460ce4385c62e16b5e289

File Language:

English

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