Evaluation of Operational Efficiencies, Cost and Accident Experience of Four Phase Single Point Urban Interchanges

Lee, Jim C.; Bonneson, James A.; Kidd, Brennan D.; Larwin, Thomas F.

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Evaluation of Operational Efficiencies, Cost and Accident Experience of Four Phase Single Point Urban Interchanges

2002-03-01
By Lee, Jim C. ; Bonneson, James A. ; Kidd, Brennan D.

File Language:

English

Details

Creators:

Lee, Jim C. ; Bonneson, James A. ; Kidd, Brennan D. ; Larwin, Thomas F.
Corporate Creators:

Lee Engineering ; Texas Transportation Institute
Corporate Contributors:

Arizona. Dept. of Transportation
Subject/TRT Terms:
Publication/ Report Number:

FHWA-AZ01-501
Resource Type:

Tech Report
Geographical Coverage:

Arizona ; United States
TRIS Online Accession Number:

00962092
Edition:

Final Report 501
Corporate Publisher:

Arizona. Dept. of Transportation
Abstract:

This research compares two interchange types, the Tight Urban Diamond Interchange (TUDI) and the Four Phase Single Point Urban Interchange (40SPUI). The 40SPUI is referred to in this report as a Single Point Urban Interchange with Frontage Roads (SPUI/F). The objectives of this research were to: (1) evaluate the SPUI/F based on available accident data and conflict analysis techniques, right-of-way and construction costs, and operating efficiency; (2) compare the performance of the SPUI/F and the TUDI; (3) evaluate current SPUI/F design assumptions and operation and recommend design and/or operational changes to enhance performance; and (4) evaluate the interchange form selection (pre-design) process and recommend changes where appropriate. The research found no significant difference in the safety aspects of the two interchange types. The SPUI/F generally did not perform as well operationally as the TUDI, with increased SPUI/F delay as the distance between frontage roads increased.
Format:

PDF
Funding:

T0049A0008
Download URL:

https://rosap.ntl.bts.gov/view/dot/42082/dot_42082_DS1.pdf
File Type:

[PDF - 3.48 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:bea7cf13232d286a8c6b70c562e4f7a8d84b735e5cdb88c0ed405313e0177873

File Language:

English

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