Iowa CDL Traffic Signs Practice Test 1

Question 1

What does a stop sign mean?

Accepted Answer

Come to a complete stop.

Answer

Proceed with caution.

Answer

Yield to other vehicles.

Question 2

What does a yield sign mean?

Accepted Answer

Slow down and give the right-of-way.

Answer

Proceed without stopping.

Answer

Speed up.

Question 3

What does a 'Do Not Enter' sign indicate?

Accepted Answer

No entry from the direction you are traveling.

Answer

No left turn allowed.

Answer

Proceed with caution.

Question 4

What does a 'One Way' sign mean?

Accepted Answer

Traffic flows in one direction only.

Answer

Left turns only.

Answer

Passing zone ahead.

Question 5

What does a yellow diamond-shaped sign with a black arrow indicate?

Accepted Answer

Sharp turn ahead.

Answer

Stop.

Answer

Lane merging.

Question 6

What does a railroad crossing sign warn about?

Accepted Answer

A train crossing ahead.

Answer

Road work ahead.

Answer

Pedestrian crossing ahead.

Question 7

What does a pedestrian crossing sign indicate?

Accepted Answer

Pedestrians have the right-of-way.

Answer

No pedestrian traffic allowed.

Answer

School zone ahead.

Question 8

What does a 'Slippery When Wet' sign warn about?

Accepted Answer

Road may be slippery when wet.

Answer

Oil spill ahead.

Answer

Rainy weather.

Question 9

What color are interstate signs?

Accepted Answer

Blue and white.

Answer

Red and white.

Answer

Green and white.

Question 10

What color are road signs indicating services such as gas stations and hospitals?

Accepted Answer

Blue and white.

Answer

Green and white.

Answer

Red and white.

Question 11

What color are highway exit signs?

Accepted Answer

Green and white.

Answer

Blue and white.

Answer

Red and white.

Question 12

What color are construction zone signs?

Accepted Answer

Orange and black.

Answer

Yellow and black.

Answer

Red and white.

Question 13

What does a 'Road Work Ahead' sign mean?

Accepted Answer

Construction ahead; proceed with caution.

Answer

Pedestrian crossing ahead.

Answer

No passing zone ahead.

Question 14

What does a 'Detour' sign indicate?

Accepted Answer

Road is closed; follow alternate route.

Answer

Road is open.

Answer

Road is under construction.

Question 15

What does a 'Left Turn Only' sign mean?

Accepted Answer

Drivers may only turn left.

Answer

Drivers may not turn left.

Answer

Stop sign ahead.

Question 16

What does a 'No U-Turn' sign mean?

Accepted Answer

U-turns are prohibited.

Answer

Left turns only.

Answer

Proceed with caution.

Question 17

What does a 'Keep Right' sign mean?

Accepted Answer

Keep to the right of the divider or obstacle.

Answer

Stay in the left lane.

Answer

Pass on the right side.

Question 18

What does a 'Merge' sign mean?

Accepted Answer

Traffic merges ahead.

Answer

No merging allowed.

Answer

Stop before merging.

Question 19

What does a 'School Zone' sign mean?

Accepted Answer

Reduce speed and watch for children.

Answer

No entry allowed.

Answer

Pedestrians must yield.

Question 20

What should you do when you see a 'School Crossing' sign?

Accepted Answer

Proceed with caution and watch for children.

Answer

Stop and wait.

Answer

Speed up to pass quickly.

Question 21

What does a 'Playground' sign mean?

Accepted Answer

Watch for children and reduce speed.

Answer

No playing allowed.

Answer

No entry allowed.

Iowa CDL Traffic Signs Practice Test 1

Explanation