FORECASTING USE ON PROPOSED HIGH-OCCUPANCY-VEHICLE FACILITIES IN ORANGE COUNTY, CALIFORNIA

Mobility problems being encountered in Orange County, California, are significant and are expected to become worse. In response, the Orange County Transit District is pursuing a transit development strategy that involves the provision of exclusive preferential facilities for buses and high-occupancy vehicles (HOVs). In developing this transitway program, a detailed analysis of potential long-range use was made, focusing on the emerging major activity centers in Orange County. The required HOV and transit demand estimates were developed through a microcomputer-based estimation process that involved nine specific tasks; a spreadsheet program was used along with various BASIC programs. Journey-to-work travel data for 1980 from the Census Bureau Urban Transportation Planning Package were used as a base and expanded to the year 2010 by using adopted population and employment growth factors. Mode splits were determined on the basis of the degree of travel-time savings that trips would achieve by using the preferential facilities in the a.m. peak hour versus mixed-flow freeways as well as origin and destination characteristics. The degree of increase in mode-split values for transit and HOVs was largely a function of corridor statistical trends from studies of before-and-after conditions on other priority projects nationwide. HOV trips were assigned by microcomputer to a network of preferential facilities using equations that specified the ranges of cells from the trip matrix that would pass through links in the network. The equations were applied to a master file of projected HOV trips to produce directional link and access-egress volumes.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1988/1181/1181-001.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=FORECASTING+USE+ON+PROPOSED+HIGH-OCCUPANCY-VEHICLE+FACILITIES+IN+ORANGE+COUNTY%2C+CALIFORNIA&author=L.+Wesemann&publication_year=1988
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1181, Urban Traffic Systems and Parking. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Wesemann, Larry
• Publication Date: 1988

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1-12
• Monograph Title: Urban traffic systems and parking
• Serial:
  • Transportation Research Record
  • Issue Number: 1181
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bus transit; Equations; Forecasting; Guideways; High occupancy vehicle lanes; High occupancy vehicles; Microcomputers; Modal split; Origin and destination; Time duration; Traffic lanes; Travel; Travel time; Utilization; Work trips
• Uncontrolled Terms: Long term
• Geographic Terms: Orange County (California)
• Old TRIS Terms: Bus transportation (Intracity); Reserved lanes
• Subject Areas: Highways; Operations and Traffic Management; Public Transportation; Research; Terminals and Facilities; I73: Traffic Control;

Filing Info

• Accession Number: 00486042
• Record Type: Publication
• ISBN: 0309047501
• Files: TRIS, TRB, ATRI
• Created Date: Aug 31 1989 12:00AM