meta-pixelIf you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?
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Question:

If you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?

Answer: 4 seconds

Explanation
The formula for following distance is one second per 10 feet of vehicle, and then add an extra second if you are traveling over 40 mph. So for a 30-foot vehicle going 55 mph, you should leave a following distance of 4 seconds.
This question is in Section 1: General Knowledge of our CDL Test Guide. Explore now!
Related Question

Question: Which of the following types of vehicles can be operated without a CDL?

1. Military vehicles operated by active duty personnel

2. Emergency snow plowing vehicles, used during emergency snow removal situations

3. Farm vehicles, if operated by a farmer within 150 miles of the individual's farm

4. All of the above

All of the above

There are several types of vehicles that can be operated without a CDL but only under certain conditions. Check the list in the Colorado Commercial Driver License Manual or contact the Colorado DMV for details.

Question: Under which of the following situations will you NOT lose your hazardous materials endorsement in the state of Missouri?

You have unpaid parking tickets

While you should be careful about not paying your tickets, since such a situation can lead to a more serious offense, unpaid tickets on their own will not make you lose your hazardous materials endorsement, like the other issues listed.

Question: Which of these should be tested while the vehicle is stopped?

1. Parking brake.

2. Service brake.

3. Hydraulic brakes.

Hydraulic brakes.

Question: When driving a set of doubles it is necessary to close which shut-off valve in the last trailer.

Back.

Question: By law, school buses must be equipped with a/an ____ lights overhead warning system as a method of controlling traffic at a school bus stop.

8

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