Air Brake Coach
Driving with air brakesQuestion 94 of 116

How does vehicle length affect brake lag?

  1. A longer vehicle has less brake lag
  2. Length has no effect
  3. A longer vehicle has more brake lag
  4. Only the weight has an effect
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Correct answer: A longer vehicle has more brake lag

The longer the vehicle, the greater the brake lag.

Source: Air Brake Manual: A Guide for Instructors (Government of Alberta, Alberta Transportation, March/April 2012), Module 1: Braking fundamentals, page 32

Practice driving with air brakes

Questions last reviewed: 18 October 2026