Speed Limits & Following Distance — Wisconsin
Wisconsin CDL practice test: 443 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Speed Limits & Following Distance: 17 questions.
Posted speed limits, school and construction zones, stopping and following distance.
This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.
| Topic / Metric | Value |
|---|---|
| Topic | Speed Limits & Following Distance |
| License test | Wisconsin CDL permit (CLP) knowledge tests |
| Topic questions | 17 (4% of 443 total) |
| Review status | This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines. |
Official handbook
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Questions (17)
1. On a slippery surface, stopping distance:
- Is longer than on a regular driving surface. ✓
- Is not as long as on a regular driving surface.
- Is about the same as on a regular driving surface.
Answer: A. Is longer than on a regular driving surface.
On a slippery surface, stopping distance is longer than on a regular driving surface. The handbook says traction is the friction between tires and the road, and slippery conditions reduce it. It states directly that it will take longer to stop when the road is slippery, and wet roads can double stopping distance. That is why you must slow down to stop within the same distance you would need on a dry road. The correct choice simply matches that rule: a slippery surface makes the stop take more distance, not less.
2. To help control liquid surge, a driver should:
- Make quick stops.
- Decrease their following distance.
- Brake rapidly.
- Brake well in advance of a stop. ✓
Answer: D. Brake well in advance of a stop.
You should brake well in advance of a stop to help control liquid surge. The tank-vehicle rules say to drive smoothly and keep steady brake pressure. For surge control, the handbook tells you to brake far ahead of a stop and to increase your following distance. Braking early gives you room to slow gradually instead of making a sharp stop that lets the liquid shift. The passage also says a quick stop should be used only to avoid a crash, using controlled or stab braking, not as a normal way to manage surge.
3. When traveling down a downgrade, the speed of a vehicle will likely:
- Decrease.
- Not change.
- Increase. ✓
- Match the speed of traffic.
Answer: C. Increase.
4. If a speed limit is posted, the posted speed:
- Should never be exceeded. ✓
- May be exceeded if passing another vehicle.
- May be exceeded if driving in a rural area.
Answer: A. Should never be exceeded.
When a speed limit is posted, you should never exceed it. The handbook states plainly that if a speed limit is posted, or a sign shows a "Maximum Safe Speed," you must never go faster than the speed shown. The same section tells you to watch your speedometer so your speed does not creep up through long work zones, and to slow further for bad weather or road conditions. So the posted number is a ceiling you stay under, not a target to beat when it suits you.
5. When driving:
- You should always drive at the posted speed limit.
- You should always drive slightly below the posted speed limit.
- You should adjust your speed according to conditions. ✓
- You should drive as fast as possible.
Answer: C. You should adjust your speed according to conditions.
You should adjust your speed according to conditions, not simply hold to the posted limit. The handbook says driving too fast is a major cause of fatal crashes, and it tells you to adjust your speed to conditions such as traction, curves, visibility, traffic, and hills. It also says most serious skids come from driving too fast for road conditions, and that drivers who adjust their driving avoid too much acceleration and avoid having to over-brake or oversteer. That is why the correct approach is to set speed by what the road and traffic are doing, not to treat the posted limit as a fixed target.
6. If you are braking on dry pavement while traveling at 55 mph, how much distance will brake lag add to your overall stopping distance?
- 32 feet ✓
- 45 feet
- 20 feet
Answer: A. 32 feet
Brake lag adds 32 feet to your overall stopping distance. The handbook explains that with air brakes there is a delay while air flows through the lines before the brakes actually work. At 55 mph on dry pavement, that brake lag distance is about 32 feet. The handbook also lists brake lag as one of the four parts of total stopping distance, along with perception, reaction, and braking distance. So the added distance from brake lag is 32 feet.
7. A sign indicating a maximum safe speed:
- Is suggesting a driving speed, but vehicles may travel faster than the posted speed.
- Is suggesting a speed limit to be followed only by vehicles weighing more than 26,000 pounds.
- Should be followed and no vehicle should travel faster than the posted speed. ✓
- Is only applicable to automobiles.
Answer: C. Should be followed and no vehicle should travel faster than the posted speed.
A sign indicating a maximum safe speed should be followed, and no vehicle should travel faster than the posted speed. The handbook says that when there is a sign indicating "Maximum Safe Speed," you should never exceed the speed shown. It treats that sign as a speed you must stay at or below, not as a casual suggestion. So the safe and proper action is to follow the posted maximum safe speed and not go faster than it.
8. In poor weather, the driver of a double or triple should:
- Lead the way for other drivers.
- Drive on the shoulder of the road.
- Exceed the posted speed limit.
- Drive carefully, as the vehicle is prone to skidding. ✓
Answer: D. Drive carefully, as the vehicle is prone to skidding.
In poor weather, you should drive carefully, because a double or triple is more prone to skidding. The doubles and triples section of the handbook stresses how important it is to be very careful when you are pulling more than one trailer, and it says extra knowledge and skill are needed to pull multiple trailers safely in different traffic and driving environments. Poor weather is exactly the kind of condition that calls for that extra care, and a multiple-trailer rig is the last thing you want sliding around. Nothing in the handbook tells you to push the pace or use the shoulder instead.
9. If another driver is tailgating you, you should:
- Move into the left lane.
- Speed up.
- Increase the distance between you and the vehicle ahead. ✓
Answer: C. Increase the distance between you and the vehicle ahead.
When someone is tailgating you, increase the distance between your vehicle and the vehicle ahead of you. The handbook lists increasing your following distance as one of the things to do when you are being tailgated. Opening up room in front of you means you won't have to make sudden speed or direction changes, and it also gives the tailgater an easier chance to get around you. The same section warns against speeding up, since being tailgated at a low speed is safer than at a high speed, and it says to avoid tricks like flashing brake lights or turning on taillights.
10. When driving a 50-foot truck at 50 mph, your minimum following distance should be:
- Four seconds.
- Five seconds.
- Six seconds. ✓
Answer: C. Six seconds.
At 50 mph in a 50-foot truck, allow at least six seconds of following distance. The handbook's following-distance rule starts with one second for every ten feet of vehicle length, so a 50-foot truck gets a five-second base. It then says to add one second when your speed is above 40 mph. At 50 mph, that extra second brings the minimum to six seconds. The same passage shows the pattern with a 40-foot truck: four seconds normally, or five seconds over 40 mph.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook