Safety Rules, Emergency Response, and Railroad Crossings
Safety Rules, Emergency Response, and Railroad Crossings
This domain tests the rules that keep a combination out of trouble: following distance, speed, railroad crossing procedure, and emergency actions for brake failure, tire failure, and fire. The exam rewards specific, calm responses.
Core rules
- Following distance: below 40 mph, leave at least one second for each 10 feet of vehicle length. Above 40 mph, add one second. A 60-foot unit at 55 mph needs about seven seconds.
- Obey posted limits and adjust for weight, weather, and curves.
- Railroad crossings: slow down, use flashers if appropriate, do not stop on the tracks, and do not proceed until you can clear the crossing completely. Look and listen; do not rely on gates.
- Never shift gears on a crossing.
- If a tire fails, hold the wheel firmly, ease off the accelerator, and avoid hard braking.
- If brakes fail, downshift, use engine braking, pump the brakes if you have pressure, and look for an escape ramp.
- If a fire starts, stop, shut off the engine, get away, and call for help.
Worked example
You approach a railroad crossing with a 70-foot combination. The light turns green for the road, but traffic is backed up beyond the tracks. You stop before the crossing rather than follow the car ahead onto the tracks. The rule is not that green means go; it is that you do not enter unless you can clear. A train can strike a trailer even if the tractor is past the rails.
Traps
- Following too closely at highway speed.
- Stopping on the tracks.
- Braking hard after a blowout.
- Shifting on a crossing.
- Assuming a green light clears the crossing.
Key points
- One second per 10 feet below 40 mph; add one above 40.
- Never enter a crossing without clear exit space.
- Hold steady after a blowout; no hard braking.
- Use escape ramps for brake failure.
- Stop, shut down, and evacuate for fire.