Space Management
What the exam tests
Space management covers following distance, lane position, overhead clearance, and side clearance. Questions test whether you keep room to stop and room to maneuver.
Core rules
- Use the 7-second following rule for heavy vehicles at highway speed.
- Avoid riding beside another vehicle; keep space to the sides.
- Check overhead clearance; many routes have low bridges or wires.
- Leave an escape route ahead and beside you.
- At a stop, leave enough space to pull around the vehicle ahead.
Worked example
A 60-foot combination vehicle at 55 mph needs about 7 seconds of following distance, or roughly 565 feet. That is more than a football field. The reasoning is that a long vehicle needs more room to stop and more room to steer around a hazard.
Traps that cost marks
- Tailgating a smaller vehicle that can stop faster than you.
- Stopping bumper-to-bumper at an intersection with no escape route.
- Ignoring posted height restrictions.
- Driving in another vehicle's blind spot instead of passing or dropping back.
Exam tip
Space management answers usually favor more room, earlier decisions, and a planned escape route.