New Jersey Car / Permit practice
Speed & Space Management
Choosing a safe speed, keeping a space cushion, adjusting for weather and traffic, and understanding stopping distance.
Questions reviewed against the official New Jersey driver handbook · July 7, 2026
12 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.
Study questions with answers
12 sample Speed & Space Management questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
1. What is the typical reaction time for most drivers under normal traffic conditions?
Correct answer: About three-quarters of a second
For the average driver in ordinary traffic, reacting to something takes roughly three-quarters of a second.
Source: New Jersey Driver Manual — Stopping Distances
2. Regardless of the posted speed limit, how fast should a driver travel?
Correct answer: Never faster than conditions safely allow
No matter what the sign says, you should not travel any quicker than the weather, the road, and other conditions make safe.
Source: New Jersey Driver Manual — Speed Control
3. Under good conditions, at least how many seconds of following distance does the three-second-plus rule call for?
Correct answer: At least three seconds
The three-second-plus rule says a driver should have at least three seconds of following distance, increasing to four or more seconds in bad weather.
Source: New Jersey Driver Manual — Three Seconds-Plus Rule
4. What factors affect how long it takes a vehicle to come to a stop?
Correct answer: Reaction time, speed, road conditions, and brake and tire condition
Stopping distance depends on many factors, including reaction time, weather and visibility, vehicle weight, brake condition, tire condition, road conditions, and speed.
Source: New Jersey Driver Manual — Stopping Distances
5. When should a driver slow down even if the posted speed limit is higher?
Correct answer: At blind curves, intersections, and on wet roads
Ease off the gas on tight or twisting roads, where roads meet, at rail crossings, on grades, around sharp or blind bends, near people on foot, and whenever the surface is wet.
Source: New Jersey Driver Manual — Speed Control
6. If mechanical trouble stops a vehicle from matching the ordinary pace of traffic, what should the driver do?
Correct answer: Pull off the road and turn on the hazard lights
If vehicle problems prevent a driver from keeping up with the flow of traffic, the driver should pull off the road and turn on the hazard lights.
Source: New Jersey Driver Manual — Speed Control
7. Using the car-length rule of thumb, how much following distance should a driver keep for each 10 mph of speed?
Correct answer: About one car length
The common rule of thumb is to stay about one car length (roughly 20 feet) back for every 10 mph of speed, increasing the gap in bad weather.
Source: New Jersey Driver Manual — Keep a Safe Distance
8. When leaving a highway using a deceleration lane, when should a driver begin to slow down?
Correct answer: After entering the deceleration lane
A driver should stay at highway speed until entering the deceleration (exit) lane, then begin slowing down within that lane, obeying any posted advisory speed.
Source: New Jersey Driver Manual — Leaving Highways
9. During bad weather, how should a driver adjust the three-second following interval?
Correct answer: Increase it to four or more seconds
When conditions turn poor, stretch that gap to four seconds or beyond, and allow even more room on snowy pavement.
Source: New Jersey Driver Manual — Three Seconds-Plus Rule
10. How far does a vehicle travel each second when moving at 60 mph?
Correct answer: About 88 feet per second
At 60 mph a car covers 88 feet in a single second, so faster speeds add a lot to how far it takes to stop.
Source: New Jersey Driver Manual — Stopping Distances
11. When entering a highway from an acceleration lane, what should a driver do?
Correct answer: Speed up to match traffic and merge when safe
A driver should use the acceleration lane to speed up to the flow of traffic, avoid stopping in it, and yield to traffic already on the main road before merging.
Source: New Jersey Driver Manual — Entering Highways
12. On snow-covered roads, what following distance does the manual recommend?
Correct answer: Six seconds or more
On roads covered in snow, a sound guideline is to hold a gap of at least six seconds behind the car ahead.
Source: New Jersey Driver Manual — Reduced Visibility
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Every New Jersey question is written from the official New Jersey driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free