Details:

Creators:
May, Adolf D. ; Leiman, Lannon
May, Adolf D. ; Leiman, Lannon Less -
Corporate Creators:
University of California, Berkeley. Institute of Transportation Studies
Subject/TRT Terms:
[+]
Computer Simulation Traffic Flow
Publication/ Report Number:
CA08-0976
Resource Type:
Tech Report
Geographical Coverage:
California
Corporate Publisher:
California. Department of Transportation
Abstract:
The primary objectives of this project have been to provide technical assistance on district freeway analysis projects, enhance the FREQ model based on guidance and suggestions from Caltrans staff members, and offer three freeway analysis workshops for Caltrans staff. Technical assistance has been provided to staff members in eleven of the twelve districts. The technical assistance took the form of providing advice and guidance on general freeway analysis issues, identifying other simulation models that could be considered for freeway investigations, and offering detailed assistance on applications of the FREQ model. During 2007 there were at least twenty-one applications in California of the FREQ model conducted by Caltrans staff members, MPOs, and contracted consultants. Six of these FREQ model applications were presented at the project's October 30, 2007 workshop and four of these FREQ model applications were presented at the project's November 1, 2007 workshop. Several levels of FREQ model enhancements were undertaken as part of this freeway analysis project. In response to two districts, special versions of the FREQ model were developed for their unique applications. In response to requests in several other districts, minor modifications were made to the standard FREQ model version. However primary attention was given to enhance the modeling of the interaction between on-ramp and off ramp operations with mainline freeway operations. Two versions including this interaction were developed and presented at the workshops in November 2007 and June 2008. Refinements in the ramp-freeway interaction module for off-ramp diverge analysis and on-ramp merge analysis are described in the following two portions of this final report. This is expected to be a continuing modeling activity. Three training workshops were held for Caltrans staff members. The first two were held in the fall of 2007 and the third was held in June 2008. A one-day training workshop was held in Los Angeles on October 30, 2007 for the southern Caltrans districts. The final workshop was a statewide two-day advanced freeway analysis workshop that was held in the Bay Area on June 18-19, 2008
Format:
PDF
Funding:
65A0227
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:a09a8423a98c5bf9faf8df7d28aba152667a16cb80c1a965eb746987ad81f950
Download URL:
https://rosap.ntl.bts.gov/view/dot/27695/dot_27695_DS1.pdf
File Type:

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