U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

L&D Manual Turn Lane Storage Validation/Update : Executive Summary Report

File Language:
English


Details

  • Creators:
  • Corporate Creators:
    University of Dayton. Department of Civil and Environmental Engineering and Engineering Mechanics
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA/OH-2012/13
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Ohio
  • Edition:
    Executive summary report.
  • Corporate Publisher:
    Ohio. Department of Transportation. Office of Statewide Planning and Research
  • Abstract:
    The formation of queues on a highway facility is a sign of the presence of operationally

    inefficient sections of the facility. Queuing occurs at intersections in large part due to overflow

    or inadequacy of turn bays, inadequate capacity, or poor signal progression. The ODOT Location

    and Design (L&D) Manual Volume 1 has storage requirements for both signalized and

    unsignalized intersections. Figures 401-9E and 401-10E of the L&D Manual provide the

    required turn lane storage lengths which should be compared with the real world conditions to

    check for adequacy of these lengths as a measure of ensuring that accesses to the turn lanes are

    not blocked. In addition to the projected turn lane volume, ODOT’s methodology incorporates

    both deceleration (based on the speed of the roadway) and potential blockage from the adjacent

    through lane. Currently, however, there are no records whether these storage lengths computed

    by the methodology put forth in this manual are valid and accurately represent the actual

    conditions at intersections in Ohio. Consequently, collecting real world traffic and queue storage

    data at some intersections and analyzing these data is valuable for validating and/or updating the

    model ODOT is currently using. Accordingly, the purpose of this research was to collect traffic

    and queue storage data at some intersections in Ohio and use the collected data to validate and/or

    update the model in ODOT’s L&D Manual.

  • Format:
    PDF
  • Funding:
    134573
  • Collection(s):
  • Main Document Checksum:
    urn:sha256:a28de38acf5fbc5a701f6120cfec484054db7be25aa23459c36922ff31950ddb
  • Download URL:
  • File Type:
    Filetype[PDF - 124.69 KB ]
PREVIOUS
File Language:
English
ON THIS PAGE
Details
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.
BACK TO TOP