An integrated computer system for analysis, selection, and evaluation of unconventional intersections.

Chang, Gang-Len; Lu, Yang; Yang, Xiangfeng; University of Maryland (College Park, Md.). Department of Civil and Environmental Engineering

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

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An integrated computer system for analysis, selection, and evaluation of unconventional intersections.

2011-03-01
By Chang, Gang-Len ; Lu, Yang ; Yang, Xiangfeng

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English

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Details:

Creators:

Chang, Gang-Len ; Lu, Yang ; Yang, Xiangfeng

Chang, Gang-Len ; Lu, Yang ; Yang, Xiangfeng Less -
Corporate Creators:

University of Maryland (College Park, Md.). Department of Civil and Environmental Engineering
Corporate Contributors:

Maryland. State Highway Administration. Office of Policy & Research
Subject/TRT Terms:

[+]

Intersection Intersections Signalized Intersections Simulator, CFI, DDI, Unconventional
Publication/ Report Number:

MD-11- SP909B4H
Resource Type:

Tech Report
Geographical Coverage:

Maryland
Corporate Publisher:

Maryland. State Highway Administration. Office of Policy & Research
Abstract:

The emergence of unconventional intersections in the traffic community has been motivated by the notion

of improving service quality with innovative control strategies, such as rerouting the turning movements

or flipping the paths of two traffic streams to facilitate the high-volume flows, thus increasing an

intersection’s overall capacity. The continuous flow intersection (CFI) and diverging diamond interchange

(DDI) are the two most popular designs. This study, responding to the need, has produced a beta version

of software for planning and analyzing the CFI family and the DDI designs. Building on the results of

extensive simulation statistical experiments, this software comprises 16 well-calibrated queue estimation

models and four equations for computing total delay. Its user-friendly interface can facilitate the efficient

performance of a preliminary evaluation of any CFI or DDI design. To create a foundation for the future

development of its operational modules for the final design stage, this study also investigated several

critical issues that may affect the precise estimate of a design’s effectiveness, including the complex

interrelationships between the spatial distribution of queue lengths at different bays; the effects of timevarying

demand patterns on the resulting queues and delays; and the effects of intersection spacing, as

well as signal control strategies, on the overall performance of a CFI or DDI design.
Format:

PDF
Funding:

SP909B4H
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:90ffa7e759f4787840a709120b0ba2695d8d193e504c82de92e4b3ef7deba1d7
Download URL:

https://rosap.ntl.bts.gov/view/dot/23050/dot_23050_DS1.pdf
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An integrated computer system for analysis, selection, and evaluation of unconventional intersections.

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