Safety of Intersections on High-Speed Road Segments With Superelevation [Technical Summary]

Tarko, Andrew

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Safety of Intersections on High-Speed Road Segments With Superelevation [Technical Summary]

2004-12-01
By Tarko, Andrew

File Language:

English

Details

Creators:

Tarko, Andrew
Corporate Creators:

Purdue University. Joint Transportation Research Program
Corporate Contributors:

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

FHWA/IN/JTRP-2004/25
Resource Type:

Brief
Geographical Coverage:

United States ; Indiana
Edition:

Brief
Corporate Publisher:

Indiana Department of Transportation
Description:

The safety analysis of intersections where both routes are two-lane roads did not show curvature to have a significant impact on safety in terms of crash frequency or severity. However, this result is unclear and may be partly due to randomness as the sample was relatively small. Curvature does appear to be a significant factor in the case where the major road is a four-lane divided highway. Full curvature and superelevation was found to increase crashes by 300% in comparison to tangent intersections. Through consultation with INDOT, these results were used to propose maximum recommended measures. Due to these safety and economic issues, INDOT currently avoids designing intersections on segments with steep superelevation. The focus of this research is to determine what effect curvature and superelevation have on intersection safety. Based on the results, the goal is to provide guidelines for improvement of existing intersections and design of new intersections where the major road is a superelevated curve.
Format:

PDF
Funding:

SPR-2797
Download URL:

https://rosap.ntl.bts.gov/view/dot/90832/dot_90832_DS1.pdf
File Type:

[PDF - 60.07 KB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:5651e79c30df95a7503dad00dc4c1d2fec09befd234d3567052e6b69c4ebdcd8eeb4e5e090b9684e26362e5a652187641d31edcc2c9f5552580e42d504d68d4e

File Language:

English

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