Analysis of two-lane, two-way highways

Roger P. Roess, Elena S. Prassas

Research output: Chapter in Book/Report/Conference proceedingChapter


The 1950 HCM [1] recognized the critical interaction between directional flows on a two-lane, two-way rural highway. Because of this, in 1950 and 1965, the models for two-lane highways dealt with both directions simultaneously. In 1950, it was argued that to keep a single lane in one direction fully utilized, that passing opportunities had to be unrestricted by alignment, sight distance, or the existence of flow in the opposite direction. Since the basic capacity of a lane on a multilane facility had been established as 2,000 pc/h/ln, it was argued that this could be achieved on a two-lane highway only when there was no opposing flow to inhibit passing.

Original languageEnglish (US)
Title of host publicationSpringer Tracts on Transportation and Traffic
PublisherSpringer International Publishing
Number of pages58
StatePublished - 2014

Publication series

NameSpringer Tracts on Transportation and Traffic
ISSN (Print)2194-8119
ISSN (Electronic)2194-8127

ASJC Scopus subject areas

  • Transportation
  • Urban Studies
  • Strategy and Management


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