Article · Wikipedia archive · Last revised Jun 11, 2026

Offset T-intersection

An offset T-intersection is an at-grade road intersection where a conventional four leg intersection is split into two three-leg T-intersections to reduce the number of conflicts and improve traffic flow. Building the offset T-intersections as continuous green T-intersections, there is a single stop on the arterial road, only. A higher volume of through traffic on the cross road, or on unsignalized intersections, a rebuild to a conventional four-leg intersection may be adequate, also when the offset is a few feet only like staggered junctions causing slower traffic for a longer time on the arterial road.

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An offset T-intersection1 is an at-grade road intersection where a conventional four leg intersection is split into two three-leg T-intersections to reduce the number of conflicts and improve traffic flow.2 Building the offset T-intersections as continuous green T-intersections (also called seagull intersection), there is a single stop on the arterial road, only.3 A higher volume of through traffic on the cross road,4 or on unsignalized intersections, a rebuild to a conventional four-leg intersection may be adequate, also when the offset is a few feet only like staggered junctions causing slower traffic for a longer time on the arterial road.5

Seen as a spur route or access road, offset T-intersections can be seen as an A2 or B2 type partial cloverleaf interchange with no arterial road.6

See also

See also

References

References

  1. Federal Highway Administration (April 2010). "Chapter 6.3.4". Alternative Intersections/Interchanges: Informational Report (AIIR). Federal Highway Administration. FHWA-HRT-09-060. Retrieved 8 May 2016.
  2. Indiana Department of Transportation (14 January 2014). Intersection Decision Guide (PDF). Indiana Department of Transportation. p. 43. Retrieved 8 May 2016.
  3. Transportation Research Board (2010). National Cooperative Highway Research Program (NCHRP) Report 650: Median Intersection Design for Rural High-Speed Divided Highways (PDF). Transportation Research Board. pp. 92–99. doc. P. 84–91.
  4. Federal Highway Administration (July 2008). Intersection Safety Strategies Brochure (PDF). Federal Highway Administration. FHWA-SA-08-008. Archived from the original (PDF) on March 19, 2021. Retrieved 8 May 2016.
  5. Institute of Transportation Engineers. Convert Two Offset T-Intersections to a Single Four-Legged Intersection (PDF). Institute of Transportation Engineers. Archived from the original (PDF) on 10 May 2016. Retrieved 8 May 2016.
  6. Institut für Straßen- und Eisenbahnwesen am KIT. Entwurf und Bau von Straßen – Teil: Straßenentwurf (PDF) (in German). Institut für Straßen- und Eisenbahnwesen am KIT. pp. SE–5–18 –20. Retrieved 7 September 2013.