CDL · On the Road

Why must bus drivers maintain greater following distance than freight drivers in similar conditions?

Correct answer

Higher consequences of any crash (passenger injuries), the need for smoother deceleration to avoid passenger injury or panic, and the higher center of gravity that limits hard braking options

  1. A Buses have less powerful brakes
  2. B Higher consequences of any crash (passenger injuries), the need for smoother deceleration to avoid passenger injury or panic, and the higher center of gravity that limits hard braking options
  3. C Bus drivers are required to follow more slowly only by company policy
  4. D They do not — following distance is identical

Why this is the answer

Bus drivers need greater following distance for several reasons. First, the consequences of any crash include passenger injuries, often serious. Second, smooth deceleration is required to avoid throwing passengers (especially standing passengers in transit operations); a hard brake that would be fine in a freight truck can injure unbelted bus passengers. Third, the high center of gravity makes panic-braking-with-steering responses more likely to roll the bus. Add 2-3 seconds beyond the freight-truck rule of thumb (one second per 10 feet of vehicle length) when in passenger service. The cushion lets you slow gradually for any unexpected event.
Source: FMCSA CDL Manual 4.3.7 Following Distance

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About this topic: On the Road

On-the-road passenger questions cover speed on curves, stopping at railroad crossings and drawbridges, managing passengers while driving, and the rules on fuelling, talking with passengers and towing. Passenger safety overrides schedule every time. This is one of 26 Passenger Transport questions on on the road, each with a full explanation on a single study page.

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