Regulatory signs
Do Not Enter sign
You may not enter this road or ramp from your direction (usually a one-way road or exit ramp).
What it looks like
Square white sign with a red circle, a white horizontal bar and white letters reading DO NOT ENTER.
- Type
- Regulatory
- Federal design code
- MUTCD R5-1
From real handbooks
How permit tests ask about it
30 of our verified questions in 30 states show this sign. A few of them, each from a different handbook where we can:
1.What does this red-and-white sign mean?
- AOnly one lane is ahead
- BSlow down and enter with care
- CDo not enter this street
- DParking is not allowed here
Show the answer
✓ C. Do not enter this street
Do Not Enter means you must not enter that street. It may be one-way the other way, or closed to all vehicles.
2.You see this sign while trying to enter an expressway ramp. What does it mean?
- AYou may not enter from this direction
- BStop, then enter when clear
- CThe ramp is closed for repairs
- DYield to traffic on the ramp
Show the answer
✓ A. You may not enter from this direction
A do not enter sign is posted where you may not enter, such as one-way streets and expressway ramps approached the wrong way.
3.Where are you most likely to see this sign?
- AAt the start of a school zone
- BAt exit ramps you must not enter
- CAt the end of a divided highway
- DBefore a steep downhill grade
Show the answer
✓ B. At exit ramps you must not enter
This sign marks road openings you must not enter, such as exit ramps, crossovers on divided roads and one-way roads.
Source: Iowa Driver's License Manual (Complete Book) (back cover 'M M1170 07/23/2026'), page 8