Do not enter sign
A regulatory sign marking a road or ramp that traffic may not enter from this direction, such as the wrong end of a one-way road or an exit ramp.
Rules vary by state and country. This explains the sign's standard meaning in the U.S. Manual on Uniform Traffic Control Devices; it isn't legal advice.
How to read it
Also searched as: R5-1, wrong way entry sign.
More road signs
Sources
- Manual on Uniform Traffic Control Devices for Streets and Highways, 11th edition, MUTCD, U.S. Federal Highway Administration
- Standard Highway Signs and Markings, U.S. Federal Highway Administration
Last reviewed September 23, 2026.