roadwise.Open study app

South Carolina driving lesson · General Driving

Changing lanes, entering & exiting highways

A 3-minute lesson from the South Carolina course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
General Driving
Checkpoint questions
5
Source pages
89, 90

Lane changes and highway merges go wrong when drivers skip the head check or move over at the wrong speed. Check, signal, find a gap, and match the traffic flow.

When changing lanes:

  • Check your mirrors
  • Check your blind spots by turning your head and looking over your shoulder toward your move
  • Identify a gap in traffic, signal, and look again in the direction of the lane change
  • Adjust your speed and steer into the lane
Handbook p. 89 ↗

Blind spots

Areas around your vehicle where your view is blocked. Check them by turning your head and looking over your shoulder in the direction you plan to move.

Handbook p. 89 ↗

Acceleration lane

The lane that runs alongside the main roadway, used to reach the speed of other vehicles before merging.

Handbook p. 89 ↗

Know the rule

Entering a multi-lane highway: use the acceleration lane to reach traffic speed, find a gap, merge with the flow, and cancel your turn signal.

Handbook p. 89 ↗
Merging onto a highway
Adjust speed, check for a gap, merge

Exiting a roadway:

  • Know where you're exiting and move early to the lane closest to your exit, avoiding a quick lane change
  • Keep your speed while you're still on the main roadway
  • Signal, move into the deceleration lane, check the posted speed, and slow down to match it
Handbook p. 90 ↗

Deceleration lane

A lane to the right of the roadway, before the exit ramp, where you slow down to exit.

Handbook p. 90 ↗
Highway deceleration lane
Use the deceleration lane to slow down

Put it into practice

Your exit is two miles ahead and you're in the left lane. Move right early, one lane at a time, keeping highway speed. At the exit, signal, move into the deceleration lane, and only then slow to the posted ramp speed.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

To enter a multi-lane highway, you should use the acceleration lane to:
  1. Come to a complete stop before merging
  2. Pass slower vehicles already on the highway
  3. Park temporarily while checking traffic
  4. Reach the speed of traffic before merging

Answer: Reach the speed of traffic before merging

Use the acceleration lane to reach the speed of other vehicles before pulling onto the roadway.

Handbook p. 89 ↗
When exiting a roadway, you should:
  1. Move over early; slow in the deceleration lane
  2. Slow down while still in the main travel lanes
  3. Wait until the last possible moment to move over
  4. Signal only after you begin slowing down

Answer: Move over early; slow in the deceleration lane

Plan to move to the lane closest to your exit early and maintain your speed until reaching the deceleration lane.

Handbook p. 90 ↗
When exiting a highway, where is the deceleration lane?
  1. To the left, before the ramp
  2. On the ramp, after the curve
  3. To the right, before the ramp
  4. On the shoulder past the exit

Answer: To the right, before the ramp

The deceleration lane is to the right of the roadway and before you reach the ramp.

Handbook p. 90 ↗
Before changing lanes, how should you check your blind spots?
  1. Check the rearview mirror twice
  2. Glance at both side mirrors
  3. Watch for other drivers' signals
  4. Turn your head and look over your shoulder

Answer: Turn your head and look over your shoulder

Check your blind spots by turning your head and looking over your shoulder in the direction you plan to move.

Handbook p. 89 ↗
After merging onto a multi-lane highway from the acceleration lane, you should cancel your turn signal.
  1. True
  2. False

Answer: True

Identify a gap, merge with the traffic flow, and cancel your turn signal.

Handbook p. 89 ↗
Take the lesson checkpoint in the app

More in General Driving