CDL · Emergency Maneuvers

If a front tire blows out while driving at highway speed, what is the correct response?

Correct answer

Grip the steering wheel firmly, ease off the accelerator gradually, hold your course, and steer to the shoulder — do NOT brake sharply until you have control and speed reduced

  1. A Immediately brake as hard as possible
  2. B Grip the steering wheel firmly, ease off the accelerator gradually, hold your course, and steer to the shoulder — do NOT brake sharply until you have control and speed reduced
  3. C Steer sharply to the right
  4. D Accelerate out of it

Why this is the answer

A FRONT TIRE BLOWOUT at highway speed is one of the most dangerous single-tire events a driver can experience. The front axle provides steering — a blowout here causes violent pulling toward the blown tire side and significant instability. CORRECT RESPONSE: (1) GRIP FIRMLY — the steering wheel will pull hard toward the flat tire; maintain a two-handed grip and resist the pull; (2) EASE OFF THROTTLE — gradually reduce engine power; DO NOT stomp the brakes — sharp braking on an unstable vehicle at high speed can cause loss of control; (3) HOLD COURSE — resist the urge to over-steer; controlled resistance to the pull is the right technique; (4) STEER TO SHOULDER — gradually steer toward the right shoulder as speed decreases; (5) BRAKE GENTLY when speed is under 30 mph — normal braking is then safe; (6) SIGNAL, ACTIVATE HAZARDS, STOP SAFELY — never stop in the travel lane if avoidable. WHY NOT BRAKE IMMEDIATELY: At 65 mph, hard braking on a vehicle with a blown steering tire dramatically increases the chance of jackknife (articulated vehicles) or spinout. The vehicle is already destabilized — braking adds weight transfer to the front that worsens the pull. Speed reduction through throttle backing is controlled; panic braking is not. REAR TIRE BLOWOUTS are less dangerous but follow similar principles — avoid panic braking, maintain control, reduce speed gradually.
Source: FMCSA CDL Manual, Chapter 4, Emergency Situations, Tire Failure

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