closing speed

English

Noun

closing speed (plural closing speeds)

  1. The combined speed of two vehicles which are about to collide head on. If both vehicles are travelling at 70 mph (miles per hour), the closing speed is 140 mph.
    • 2021 February 24, Greg Morse, “Great Heck: a tragic chain of events”, in RAIL, number 925, page 39:
      This secondary collision, head-on with a closing speed of 142mph, caused the DVT to veer off to the left. Many of the coaches behind it overturned and careered into an adjacent field.
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