Driving Safely
Driving Safely covers the judgment calls the Oklahoma CDL exam expects from a working driver: legal limits on alcohol and hours of service, railroad crossings, fatigue, aggressive drivers, and driving in bad weather or at night.
Legal limits
- A CDL holder is under the influence at 0.04% BAC - half the 0.08% limit for non-commercial drivers. Refusing a test can cost you the CDL for at least a year.
- Hours of service: 10 consecutive hours off duty, 11 hours of driving, a 14-hour on-duty window, a 30-minute break after 8 cumulative hours of driving, and 60/70 hours in 7/8 days.
Railroad crossings
- Slow down, look and listen, and stop 15–50 feet before the nearest rail if a train is coming. Never shift gears while crossing, and never stop on the tracks.
Fatigue and other drivers
- Fatigue slows reaction time and judgment; pulling over and resting is the only real fix. Caffeine and cold air are not.
- With an aggressive driver, do not make eye contact or escalate - let them go.
Worked example: You have 10.5 hours of driving and 15 minutes left on your 14-hour window; the terminal is 12 miles away at 45 mph. That is roughly 16 minutes of driving and would put you past 11 hours. The correct answer is to stop at the first safe place and go off duty - not to speed or finish "just this once."
Traps: assuming the 0.08% limit applies to you; rolling through a crossing because the gate is up; treating the 30-minute break as optional; believing a nap in the driver's seat resets the 10-hour off-duty requirement - it does not.