California Car / Permit practice question · Sharing the Road
Traveling at 55 mph, an average passenger vehicle can stop within about 300 feet. A large loaded truck traveling at the same speed may need:
Answer choices
- Up to 400 feet to stop— Correct answer
- About the same 300 feet to stop
- Only 150 feet to stop
- It can stop instantly using engine braking
Why this is the answer
An average car going 55 mph can stop in about 300 feet, while a large vehicle at that speed may need up to 400 feet. More weight and more speed both lengthen the stopping distance. So do not cut in front of a truck and then slow down suddenly.
Source: California Driver Handbook — Sharing the Road with Trucks
Content reviewed against official driver handbooks · August 12, 2026
More Sharing the Road questions
- A streetcar, trolley, or bus has paused at a designated safety zone (or a traffic light) to let riders on and off. What is the fastest speed at which you may go around it?
- When sharing the road with a horse-drawn vehicle or a person riding a horse, it is illegal to:
- A bicyclist is riding near the middle of a narrow traffic lane instead of hugging the curb. This is:
- You should give a motorcyclist the full width of a traffic lane because:
- A school bus ahead has stopped and is flashing red lights with its stop arm out. You must: