rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Development of guidelines for triple left and dual right-turn lanes
    sub title: technical report
  name:
    name part: Cooner, Scott Allen.
  name:
    name part: Texas Transportation Institute
  name:
    name part: Texas
    name part: Department of Transportation.
  name:
    name part: United States
    name part: Federal Highway Administration.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2011
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: 1 volume (various pagings) : illustrations (some color) ; 28 cm.
  abstract: Left- or right-turn lanes at intersections improve safety and operations by separating turning and through vehicles. At intersections with heavy turning demand, it may be necessary to provide multiple turn lanes. Triple left-turn (TLT) and dual right-turn (DRT) lanes are still considered as relatively new designs that many agencies are reluctant to use, so they are somewhat limited in Texas. Guidelines for TLT or DRT lanes are almost nonexistent, leaving traffic engineers to rely on judgment for their designs. Therefore, their research was needed to develop consistence guidance. The 0-6112 project achieved two primary project goals: (1) development of geometric and signal design guidelines for TLT and DRT lanes; and (2) evaluation of the safety and operational performance of TLT and DRT sites in Texas. Researchers conducted field studies at 5 TLT and 20 DRT, primarily in the Dallas-Fort Worth and Houston urban areas, in order to evaluate lane utilization patterns, saturation flow rates, conflicts, and other operational factors. The research team also analyzed safety performance by investigating the crash history of the 25 sites using three techniques: collision diagrams, field conflict study, and comparison study. The results revealed that TLT lanes do not experience any major safety issues and also concluded that, in general, a well-designed DRT lane does not cause significantly higher crash frequency or severity compared to single right-turn lanes. Based on the results of this research and the geometric and signal design guidelines, Tudor and other agencies should be confident that well-designed TLT and DRT lanes can be implemented to address heavy turning demand at key intersections. The evaluation of these multiple turn lane sites in Texas revealed that they perform well from both operational and safety standpoints. TLT and DRT lanes are not appropriate for all situations, and their use should be supported by an operational analysis. Other techniques (grade sepa…
  note: by Scott A. Cooner [and others].
  note: "January 2011. Published: July 2011."
  note: Technical report; Sept. 2008-Aug. 2010.
  note: Performed in cooperation with the Texas Department of Transportation and Federal Highway Administration 0-6112
  note: Includes bibliographical references.
  subject:
    geographic code: n-us-tx
  subject:
    topic: Turning lanes
    geographic: Texas
  related item:
    title info:
      title: Research report (Austin, Tex.) ; 0-6112-1
  record info:
    record content source: TXA
    record creation date: 111018
    record change date: 20151202143714.0
    record identifier: in00002727108