TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Exploration and evaluation of crash-and simulation-based safety performance of freeway facilities

Accession Number:

01764264

Record Type:

Component

Abstract:

The main objective of this study is to evaluate the safety effects caused by altering drivers of the lengths of deceleration and acceleration lanes at rest areas on expressways in Korea. Although general conclusions can be found through crash-based safety analysis, to examine more specific optimal conditions considering various traffic conditions, this study proposes a novel framework to explore and evaluate crash-based and simulation-based safety performances. For this purpose, the safety performance function (SPF) and crash modification factor (CMF) were developed to reflect real-world safety impacts. To consider nonlinear trends of the parameters, nonlinearizing link functions were introduced into the analysis. Two types of simulation analyses were conducted to 1) find the combination of surrogate safety measures (SSMs) that best fit with the crash-based safety performance results and 2) determine the optimal lengths of deceleration lane and acceleration lanes for different traffic conditions. The results showed that the best length of deceleration lane of a rest area is between 240 m and 260 m, depending on the traffic conditions. The results also indicated that the optimal length of acceleration lane of a rest area is between 385 m and 400 m, depending on the traffic parameters. The findings of this study could be used to determine the safety solutions with a micro-traffic simulator.

Supplemental Notes:

This paper was sponsored by TRB committee ACS20 Standing Committee on Safety Performance Analysis.

Report/Paper Numbers:

TRBAM-21-01202

Language:

English

Corporate Authors:

Transportation Research Board

Authors:

Kim, Hyeonseo
Kwon, Kyeongju
Park, Nuri
Park, Juneyoung
Abdel-Aty, Mohamed

Pagination:

14p

Publication Date:

2021

Conference:

Transportation Research Board 100th Annual Meeting

Location: Washington DC, United States
Date: 2021-1-5 to 2021-1-29
Sponsors: Transportation Research Board; Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Geographic Terms:

Korea

Subject Areas:

Highways; Operations and Traffic Management; Planning and Forecasting; Safety and Human Factors

Source Data:

Transportation Research Board Annual Meeting 2021 Paper #TRBAM-21-01202

Files:

TRIS, TRB, ATRI

Created Date:

Dec 23 2020 11:23AM