The Commercial Drivers License (CDL) Study Guide

Space for Turns

The space around a truck or bus is important in turns. Because of wide turning and offtracking, large vehicles can hit other vehicles or objects during turns. Right Turns. Here are some rules to help prevent right-turn crashes:

• Turn slowly to give yourself and others more time to avoid problems.

• If you are driving a truck or bus that cannot make the right turn without swinging into another lane, turn wide as you complete the turn, as shown in Figure 2-11. Keep the rear of your vehicle close to the curb. This will stop other drivers from passing you on the right.

• Don’t turn wide to the left as you start the turn, as shown in Figure 2-12. A following driver may think you are turning left and try to pass you on the right. You may hit the other vehicle as you complete your turn.

• If you must cross into the oncoming lane to make a turn, watch out for vehicles coming toward you. Give them room to go by or to stop. However, don’t back up for them, because you might hit someone behind you.

Left Turns.

On a left turn, make sure you have reached the center of the intersection before you start the left turn. If you turn too soon, the left side of your vehicle may hit another vehicle because of offtracking.

If there are two turning lanes, always take the righthand turn lane. Don’t start in the inside lane because you may have to swing right to make the turn. Drivers on your right may be hard for you to see.

If there are two left turn lanes, use the right hand lane.

Space Needed to Cross or Enter Traffic

Be aware of the size and weight of your vehicle when you cross or enter traffic. Here are some important things to keep in mind:

• Because of slow acceleration and the space large vehicles require, you may need a much larger gap to enter traffic than you would in a car.

• Acceleration varies with the load. Allow more room if your vehicle is heavily loaded.

• Before you start across a road, make sure you can get all the way across before traffic reaches you.

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