MS CDL Passenger common mistakes
MS CDL Passenger · Understand the traps and how to avoid them.
Runs the pre-trip walk-around from the driver's seat, flipping the light switch and calling out 'lights okay' without walking to the front, rear and both sides to confirm each lamp - brake lights, turn signals, four-ways, clearance lights and backup lights - actually illuminates.
The walk-around feels redundant on a bus that ran fine yesterday, and checking brake lights requires a second person or a reflective surface, so candidates shortcut the one step that is hardest to verify alone.
What to do instead
Build a fixed route around the bus and stop at each station: front, right side, rear, left side, then the engine compartment. Use a wall, a window or a colleague to confirm brake lights and turn signals, and put a gauge on each tire instead of kicking it.
Builds air pressure, then releases the parking brake and rolls the bus without doing the static leakage tests - no applied-leak check, no low-air warning check, no spring-brake pop-off check, and no pushrod stroke measurement.
The tests take several minutes, require the engine off and wheels chocked, and candidates memorize the checklist in one order while skipping steps they cannot picture; many confuse the pre-trip air test with the in-service brake check.
What to do instead
Practice on a real bus until the sequence is automatic: build to governor cut-out, shut off the engine, chock the wheels, release the parking brake, time one minute for leakage, apply and hold for the applied-leak test, pump down to confirm the warning by 60 psi and spring brakes between 20 and 45 psi, then check pushrod travel against the chamber limit.
Holds the interlock override switch or wedges the door so the bus creeps forward while passengers are still stepping off, instead of waiting for the door to close and the interlock to release.
Schedule pressure at a busy stop - the driver wants to close the gap to the curb or pull into traffic before the last passenger is clear, and the override makes that possible.
What to do instead
Know which interlock type your bus has (electric, air or transmission) and test it during the pre-trip by trying to move with the door open in a safe area. In service, treat the door-closed light and the interlock as the permission to move, and never use the override except during an emergency evacuation.
Boards a full load and lets standees fill the aisle forward of the standee line and stand in the step well, with bags left in the aisle and in front of the emergency door.
Nobody wants to tell a paying passenger to move, and at a crowded stop the driver's attention is on the farebox and the schedule rather than the yellow line.
What to do instead
Count as passengers board, announce 'we're at the standee limit, the next bus is X minutes' before the aisle fills, and stop boarding when the limit is reached. Sweep the mirrors across the aisle and step well before pulling out, and refuse or stow any bag that blocks the aisle or an exit.
Approaches a railroad crossing without stopping, or stops but rolls across without opening the door or window to listen, and never checks for a second train after the first clears.
The crossing is familiar and the gate is up; candidates also assume the stop rule applies only to school buses, or they treat crossings without an 'exempt' sign as exempt.
What to do instead
Memorize the rule: a passenger-carrying bus must stop 15 to 50 feet before the nearest rail at every crossing unless it is posted exempt or an officer is directing traffic. Verbalize the procedure each time - stop, open door, look both ways, listen, check the second track, cross without shifting gears.
Uses the same following distance as in a car and brakes late and hard, so standees lurch into the aisle and seated passengers are thrown forward.
Habit transfer from a personal vehicle, plus a bus accelerates and stops more slowly, so the gap closes without the driver noticing until a hard stop is needed.
What to do instead
Use at least one second per 10 feet of vehicle length below 40 mph and add a second above 40 mph - for a 40-foot bus that means 4 seconds at low speed and 5 or more on the highway. Brake early and progressively, and scan 12 to 15 seconds ahead so you never have to stab the pedal.
Picks up the phone to read a dispatch text or dial at a red light, or holds it to the ear while rolling through the lot, treating a stopped bus as 'not driving'.
Dispatch and riders both expect instant answers, and a red light or a slow yard feels like free time to catch up.
What to do instead
Mount the phone in a cradle before departure, set the route and any apps while parked, and use hands-free only for short calls. If you must read or reply, pull into a legal parking space, set the brake and take the keys. Handheld phone use is prohibited while driving a CMV, and sitting at a red light still counts.
Lets a passenger board with a gasoline can, propane cylinder or box of fireworks in a shopping bag because it is 'sealed' and the passenger says it is not dangerous, and never questions an unattended bag left on a seat.
The driver does not want a confrontation at the door, and many forbidden items look like ordinary luggage or shopping.
What to do instead
Know that passenger vehicles may not carry gasoline, propane, fireworks, ammunition or other hazmat, and that you may refuse boarding. Ask about contents, watch for leaks, odors, wires or ticking, and treat unattended items as suspicious - do not touch, isolate the area, and report to dispatch and 911.
Points at the emergency door, roof hatch or break-glass window during the pre-trip instead of actually operating it, and cannot say which exits count toward the bus's capacity or when to evacuate rather than stay put.
The exits are rarely used, the release mechanisms differ from bus to bus, and candidates study the diagram instead of practicing the motion.
What to do instead
Open and close every exit on your bus - emergency door, roof hatches, side windows - until you can do it without looking. Know the evacuation order (engine off, keys, extinguisher, evacuate upwind to a rally point, account for passengers, call 911) and when a fire or hazmat release means evacuate rather than shelter in place.
Walks to the back of the bus down the aisle, glances left and right, and signs the card 'all OK' without checking under the seats, the restroom or the overhead racks, and without writing up the defect noticed during the run.
End-of-shift fatigue and the assumption that the bus emptied at the last stop, combined with the feeling that a written defect will delay the next run.
What to do instead
Walk the full length with a flashlight, checking each seat row, under the seats, the restroom and the overhead bins; call out and wait at the rear before locking up. Write every defect on the DVIR or work order with bus number and time, and report it to the mechanic before the next run.