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Title:

Safety Evaluation of Median U-Turn Crossover-Based Intersections

Accession Number:

01741970

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/issn/03611981

Abstract:

Alternative innovative designs for intersections were defined to enhance traffic operation and safety. Median U-turn (MUT) and restricted crossing U-turn (RCUT) intersections are among the types of alternative intersections that enable drivers to make left-turn movements at median U-turn crossovers downstream of the main intersection. Recently, municipalities and transport agencies have tended to implement these types of intersections. However, their effectiveness in crash reduction has not been adequately determined in previous studies. This is because of the limited number of alternative intersections that were considered in these studies. In addition, there was no consideration for the unusual new geometric design of these intersections. In this study, a safety evaluation was conducted while considering the new intersection-related areas at MUT and RCUT intersections to clarify and quantify their effectiveness in crash reduction. This study considered 73 MUT and 12 RCUT intersections. Two types of MUT intersections were considered in this study. Crash modification factors for MUT and RCUT intersections were estimated by using before–after and cross-sectional methods. The results indicated that MUT and RCUT intersections are safer than conventional intersections. MUT intersections are effective in reducing total, property damage only (PDO), rear-end, and opposite-direction sideswipe crashes, although they significantly increase single-vehicle and non-motorized crashes. RCUT intersections are effective in reducing fatal-and-injury, injury, head-on, and angle crashes. Findings of this research provide clear evaluation for decision makers about the effectiveness of MUT and RCUT intersections in crash reduction.

Supplemental Notes:

All opinions and results are those of the authors. © National Academy of Sciences: Transportation Research Board 2020.

Language:

English

Authors:

Al-Omari, Ma’en Mohammad Ali
Abdel-Aty, Mohamed
Lee, Jaeyoung
Yue, Lishengsa
Abdelrahman, Ahmed

Pagination:

pp 206-218

Publication Date:

2020-7

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Volume: 2674
Issue Number: 7
Publisher: Sage Publications, Incorporated
ISSN: 0361-1981
EISSN: 2169-4052
Serial URL: http://journals.sagepub.com/home/trr

Media Type:

Web

Features:

References (29)

Subject Areas:

Highways; Operations and Traffic Management; Safety and Human Factors

Files:

TRIS, TRB, ATRI

Created Date:

Jun 4 2020 3:04PM