Defensive Driving · Driver Training VideoObeying Traffic Control Devices & Signs

Every stop sign, signal, speed limit, and railroad gate you pass is a legal command, not a suggestion. Roll through one and you're not looking at a warning — you're looking at a violation that can follow you for years, and in some cases pull your CDL.

Start with why this matters

You're required to obey every traffic control law wherever you're driving a commercial vehicle. Run a device and cause a serious crash, and that single moment can trigger a CDL disqualification, sometimes on the first offense.

Stop signs

A complete stop means the wheels stop turning — behind the stop line if there is one, or before the crosswalk, or before the intersection if there's neither.

Traffic signals

A light that's been green a long time is a stale green — expect it to change and cover your brake. Yellow is not a cue to speed up; it's a decision point. If you can stop safely, stop.

Regulatory and speed signs

Obey the posted limit, but know some states post a separate, lower limit just for trucks — a smaller sign near the main one. That applies to you even if every car around you is going faster.

Warning signs

Curve and steep grade signs mean slow down now, not when you feel the truck lean or the brakes start to fade.

Railroad crossings

Approach every crossing ready to stop, whether the lights are flashing or not. Never stop with any part of your rig on the tracks — if traffic ahead has you boxed in, hold back until there's room to clear the crossing completely.

Your company standard: every device gets obeyed, every time — no exceptions for running late or knowing the road.