Breakdowns happen. Even with meticulous maintenance, mechanical failures, blowouts, and electrical issues can leave you stranded on the shoulder of a busy highway. How you handle the situation in the first few minutes determines whether it stays a minor inconvenience or becomes a life-threatening emergency. Every CDL driver should have a clear plan before a breakdown ever occurs.
Get Off the Road Safely
As soon as you sense something is wrong — unusual noises, loss of power, a tire blowout — activate your hazard lights immediately. Gradually reduce speed and steer toward the right shoulder or the nearest safe pulloff. Do not slam on the brakes. If possible, coast to a flat, straight section of road with good visibility. Avoid stopping on curves, hills, or narrow shoulders where approaching traffic cannot see you in time to react.
Make Your Truck Visible
Once stopped, keep your hazard lights on and set out reflective warning triangles. FMCSA regulations require three triangles: one 10 feet behind the truck, one 100 feet behind, and one 200 feet behind. On a divided highway, place them on the traffic side. At night or in low-visibility conditions, this step is critical — a parked truck on a dark shoulder is nearly invisible to approaching drivers. If you have road flares, use them as additional warning devices.
Assess the Situation and Call for Help
Do a quick visual assessment of the problem, but do not attempt major repairs on the side of a highway. Contact your dispatcher or fleet maintenance department to report the breakdown and your exact location. Use mile markers, GPS coordinates, or nearby exit numbers to communicate where you are. If the situation involves smoke, fire, or a hazardous materials concern, call 911 first. Keep your roadside assistance numbers saved in your phone and posted in your cab.
Stay Safe While Waiting
Remain inside your cab with your seatbelt on whenever possible — your truck is the best protection against a rear-end collision from passing traffic. If you must exit the vehicle, do so from the passenger side, away from the travel lanes. Wear a high-visibility vest. Never stand between your truck and another vehicle, and never walk along the highway. If conditions feel unsafe, move well away from the roadway and wait for help at a safe distance.
Breakdown procedures are covered in detail during CDL training at National Standard Trucking School. Our instructors in Tacoma, WA draw on years of real-world driving experience to prepare students for situations that matter most. Call (253) 210-0505 to learn about our training programs.
