A Comparison of Critical Gap of U Turning Vehicles at Uncontrolled Median Opening Based on Different Methods

Median openings are quite effective to access opposite traffic without creating any conflict with left-turns and crossing movements of that lane. While the turning operation is extremely complex. Most of the median openings in India are uncontrolled. Thus, a U-turning vehicle needs to accept a time span or gap between the arrivals of successive vehicles on through traffic of opposing lane to perform safe turn. This study estimates critical gap of U turning vehicle using three different methods namely Traditional method, INAFOGA method and Modified Raff's method at un-controlled median opening. Data were collected at six sites of median openings through video recording technique. A comparison of critical gap for each motorized mode was done between each method using t test. Result shows that critical gap obtained by INAFOGA method are found to be higher by 5.3% as compared to Traditional method and 13.2% higher as compared to Modified Raff's method.

• Record URL:
  • https://doi.org/10.11175/easts.12.1728
• Record URL:
  • http://scholar.google.com/scholar_lookup?title=A%20Comparison%20of%20Critical%20Gap%20of%20U%20Turning%20Vehicles%20at%20Uncontrolled%20Median%20Opening%20Based%20on%20Different%20Methods&author=V.%20SHARMA&author=S.%20MONDAL&author=A.%20GUPTA&publication_year=2017
• Authors:
  • SHARMA, Vinay Kumar
  • MONDAL, Satyajit
  • GUPTA, Ankit
• Publication Date: 2017

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 1728-1739
• Serial:
  • Journal of the Eastern Asia Society for Transportation Studies
  • Volume: 12
  • Issue Number: 0
  • Publisher: Eastern Asia Society for Transportation Studies
  • EISSN: 1881-1124
  • Serial URL: https://www.jstage.jst.go.jp/browse/easts/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Gap acceptance; Median openings; Merging traffic; U turns; Unsignalized intersections
• Uncontrolled Terms: Critical gap
• Geographic Terms: India
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 01675940
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Jul 24 2018 10:07AM