COMPUTER-ASSISTED TRAFFIC ENGINEERING USING ASSIGNMENT, OPTIMAL SIGNAL SETTING, AND MODAL SPLIT
Methods of traffic assignment, traffic signal setting, and modal split analysis are combined in a set of computer-assisted traffic engineering programs. The system optimization and user optimization traffic assignments are described. Travel time functions are presented for freeways, freeway entrance ramps, and signalized streets. Both single-vehicle and multiple-vehicle class (cars, car pools, and buses) formulations are described. Energy optimization is treated, and gasoline consumption functions for cars and buses are shown. Modal split analysis is described and integrated with the assignments so that the effect of favoring buses and car pools with 'diamond lanes' can be measured. The procedures are described and numerical examples are presented. It is concluded that this approach to traffic engineering is practical and computer programs can be written to analyze major parts of the traffic networks of U.S. cities.
Massachusetts Institute of TechnologyDepartment of Civil Engineering, 77 Massachusetts Avenue
Cambridge, MA USA 02139
Transportation Systems Center55 Broadway, Kendall Square
Cambridge, MA USA 02142
- Gershwin, S B
- Little, JDC
- GARTNER, N
- Publication Date: 1978-5
- Pagination: 101 p.
- TRT Terms: Algorithms; Buses; Carpools; Energy conservation; Freeways; Fuel consumption; Information processing; Networks; Optimization; Ramps (Interchanges); Strategic planning; Traffic assignment; Traffic control; Traffic engineering; Traffic signals; Travel time; Urban transportation
- Old TRIS Terms: Freeway ramps; Modal speed
- Subject Areas: Energy; Environment; Highways; Operations and Traffic Management; Public Transportation;
- Accession Number: 00181333
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: DOT-TSC-RSPA-78-10 Final Rpt.
- Contract Numbers: DOT-TSC-849
- Files: NTIS, TRIS
- Created Date: Sep 27 1981 12:00AM