Bus trap

From Wikipedia, the free encyclopedia
A bus trap in Denmark
A bus trap in northern Aarhus, Denmark

A bus trap (car trap in the UK) is a metal grate placed over a ditch or pit in the road with tines (sides) spaced far enough apart that small (shorter axle) vehicles fall between the tines but close enough that larger-diameter-wheeled vehicles, such as buses, may pass.[clarification needed] Cycles may cross broader sided examples.

Different versions exist for restricting access. The tines cross the path of the road, not parallel with the road direction. Small-wheeled vehicles bottom out in between the tines, preventing the vehicle from continuing over the obstacle.

Deprecation and preferred alternatives[edit]

Barrier on the entrance to a busway in Ipswich, England

Many domestic vehicles exist in the 21st century wide enough to navigate bus traps effectively, including wide-axle SUVs and 4x4s. Police cars and in some cases motorbikes are hindered by bus traps. Most cities favour other means of keeping cars out of bus-only areas, such as:


The city of Calgary, Canada, began installation of bus traps in 1970s and primarily used them to restrict access to transit facilities and neighborhoods attempting to discourage pass-through traffic. The last seven bus traps are scheduled to be removed in 2023 and 2024.[1]

See also[edit]


  1. ^ Dippel, Scott (August 4, 2022). "End coming soon for Calgary's notorious bus traps". CBC News. Retrieved August 10, 2022.