Speed, Space and Hazards

At 55 mph on dry pavement, a driver covers about 142 feet while perceiving a hazard, 61 feet while reacting and 216 feet while braking. What is the total stopping distance?

A driver crawls through a terminal at 20 mph, then reaches 40 mph on the access road. Compared with 20 mph, how much longer is the braking distance at 40 mph?

Overnight snow has been packed down by traffic on your route. Compared with your dry-road speed, how much should you slow down?

The temperature is 26 F. It has not rained, yet a stretch of road ahead looks wet. What should you suspect?

Rain starts to fall after two dry weeks. Why is the road especially slippery during the first part of the shower?

Driving a manual-transmission truck through heavy rain, you feel the steering go light as the tires hydroplane on standing water. What should you do?

You drive a 40-foot straight truck at 35 mph on a city arterial. Under the handbook, what is the least following distance you should keep?

In a 50-foot rig at 55 mph, you count 3 seconds between the car ahead passing a sign and your truck reaching it. How many more seconds of gap do you need?

To check your following distance, you start counting "one thousand-and-one" as the car ahead passes the shadow of an overpass. When do you stop counting?

A pickup is riding close behind your loaded truck on a two-lane highway. What does the handbook recommend?

A heavy load is slowing your truck on a long uphill grade of a four-lane highway. Where should you drive?

This morning your loaded van trailer cleared an old railroad underpass with a few inches to spare. You return empty on the same road. What is true?

A road slopes toward the shoulder, tilting your trailer toward signs and tree limbs along the edge. What should you do?

Your bus cannot make a right turn at a narrow corner without using part of another lane. How should you make the turn?

On a busy three-lane highway, you find yourself driving right alongside a car for several miles. Which danger does the handbook name?

A car ahead brakes hard near an exit as though its driver is unsure whether to take the ramp. Why does the handbook call this car a hazard rather than an emergency?

A cardboard box lies in your lane on the interstate. What does the handbook say about boxes like this?

An exit ramp curves downhill with a posted advisory speed of 35 mph. Why might 35 mph still be too fast for your heavily loaded truck?

You are driving past a row of parked cars. Which clue suggests one of them is about to pull out?

Late on a freezing January night, which clue does the handbook list as a sign that a nearby driver may be impaired?

Reading a text takes a driver's eyes off the road for about 4.6 seconds. At 55 mph (about 80.7 feet per second), roughly how far does the truck travel unwatched?

Under the federal rule for CMV drivers, which of these counts as using a hand-held mobile phone?