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Delaware driving lesson · Sharing the Road

Trucks & the No-Zone

A 3-minute lesson from the Delaware 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
Sharing the Road
Checkpoint questions
5
Source pages
100, 101, 102

Big trucks have large blind spots, need more room to stop and swing wide to turn. Many truck-car crashes happen in the 'No-Zone'—the areas around a truck where its driver simply can't see you.

No-Zone

The danger areas around a truck—its large side blind spots, deep rear blind spot and the area just ahead—where crashes are more likely.

Handbook p. 101 ↗

Know the rule

To pass a truck, check front and rear and move out only in a legal passing zone when clear. If needed—especially at night—blink your headlights to let the driver know you're passing.

Handbook p. 100 ↗

Know the rule

On a level highway, passing a truck takes only three to five seconds longer than passing a car. Uphill a truck often slows, making it easier to pass; downhill its momentum may make you speed up.

Handbook p. 101 ↗

Know the rule

Finish the pass quickly and don't stay alongside. Pull back in only when you can see the front of the truck (the cab) in your rear-view mirror, and keep your speed up afterward.

Handbook p. 101 ↗

Know the rule

When a truck passes you, keep to the far side of your lane and slow slightly—never speed up.

Handbook p. 101 ↗

Know the rule

Meeting a truck from the opposite direction, keep as far to the side as possible. Wind turbulence pushes the vehicles apart; it doesn't suck them together.

Handbook p. 101 ↗
4 sec

Minimum following distance behind a truck

Handbook p. 101 ↗

Know the rule

Trucks have deep blind spots directly behind them. Tailgating hides you from the driver and blocks your own view of traffic.

Handbook p. 101 ↗

Know the rule

Truck drivers may swing wide to the left to make a right turn. Never cut in between the truck and the curb or shoulder.

Handbook p. 102 ↗
66%

Share of commercial vehicle crashes that happen while backing

Handbook p. 102 ↗

Know the rule

Never pass close behind a truck that is backing up. Most trailers are 8.5 feet wide and can completely hide what's behind them—wait the few seconds it takes to finish.

Handbook p. 102 ↗
Truck blind spot (no-zone) diagram
The No-Zone: blind spots around a truck

Put it into practice

A tractor-trailer ahead signals right but swings left into your lane first. Don't squeeze past on its right—stay back until it completes the turn.

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.

What percentage of commercial vehicle crashes occur while the truck is backing up?
  1. 16 percent
  2. 66 percent
  3. 36 percent
  4. 90 percent

Answer: 66 percent

Sixty-six percent of all commercial vehicle crashes happen while backing, so you should never cross behind a truck that is backing up.

Handbook p. 102 ↗
When following a large truck, you should leave at least how much following distance to stay out of its rear blind spot?
  1. 1 second
  2. 2 seconds
  3. 4 seconds
  4. 8 seconds

Answer: 4 seconds

Allow at least four seconds between your vehicle and a truck to avoid the deep rear blind spot, or 'No-Zone.'

Handbook p. 101 ↗
Why do truck drivers sometimes swing wide to the left before making a right turn?
  1. To signal they intend to turn left instead
  2. To let cars pass on the right
  3. Because it is required by federal law
  4. To safely negotiate the turn without hitting the curb

Answer: To safely negotiate the turn without hitting the curb

Truck drivers swing wide left to safely complete a right turn; cutting between the truck and the curb is dangerous.

Handbook p. 102 ↗
When approaching a truck's side blind spot, called a 'No-Zone,' you should
  1. avoid lingering there since the truck driver may not see you
  2. stay there as long as needed since it's the safest place
  3. flash your lights to alert the driver you're there and stay put
  4. assume the driver always sees you

Answer: avoid lingering there since the truck driver may not see you

Trucks have large side blind spots; spending time in these No-Zones means the driver cannot see you if they need to change lanes.

Handbook p. 102 ↗
It is safe to pass closely behind a truck that is backing into a loading area to save time.
  1. True
  2. False

Answer: False

Passing behind a backing truck puts you in the driver's blind spot and is a leading cause of backing crashes.

Handbook p. 102 ↗
Take the lesson checkpoint in the app

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