Based on ten years of experience with ramp metering projects and a detailed analysis of 154 of the 381 existing metered ramps in California, it is concluded that ramp metering has a minimum impact on local streets. Ramp metering is also beneficial to total corridor traffic flow, including both the freeway and paralleling local streets. Side effects on city streets that are not correctable by traffic engineering techniques are not significant. The cost of initial modification to the city streets and adjustments or changes on an on-going basis is borne by the California Department of Transportation. It was found that cost to the city for a decrease in the life of city street pavement cannot be caluclated because of the small diversion to city streets and the short period of time it occurs. In the worst case measured in this report, the net increase in the daily traffic was less than 1%. Payment for decreased pavement life for such small changes cannot be justified as the effect of such changes is virtually immeasureable. Increases or decreases in enforcement costs, and costs from accidents, are also too small to calculate meaningfully. As a matter of policy, Caltrans establishes a cooperative agreement with cities where ramp meters are to be installed, reimbursing costs to the city stemming from the installation of ramp meters, including modification of city traffic signals, signing, and striping. The cooperative agreement procedure to reimburse cities for actual costs incurred relative to ramp metering in their city has been adequate. /Author/

  • Supplemental Notes:
    • Submitted to the California Legislature.
  • Corporate Authors:

    California Department of Transportation

    1120 N Street
    Sacramento, CA  United States  95814
  • Publication Date: 1979-2

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00196428
  • Record Type: Publication
  • Report/Paper Numbers: DivOperMar200CTSacto
  • Created Date: Oct 17 1979 12:00AM