Regulatory Road Sign (R5-1)
Do Not Enter Sign Meaning & Driving Rules
The Do Not Enter sign (MUTCD R5-1) prohibits all motor vehicles from entering a roadway, ramp, or designated lane where traffic is flowing exclusively in the opposite direction.
Required Driver Action & Right-of-Way Protocol
DO NOT PROCEED PAST THIS SIGN. If you have already begun turning onto the roadway, immediately stop your vehicle, check for traffic, and execute a safe turn-around or back up onto the cross street if safe to do so.
Detailed Overview & Purpose
The Do Not Enter sign is one of the most critical life-safety traffic control devices on American roads. It is deployed at access points where entering would place a motorist on a direct head-on collision path with opposing traffic. The design features a bold solid red circle containing a wide white horizontal bar set inside a white square.
Do Not Enter signs are universally installed at freeway off-ramps, entries to one-way urban streets, crossover lanes on divided highways, and exclusive public transit corridors. They are frequently paired with 'WRONG WAY' signs positioned several yards deeper into the ramp to provide a secondary emergency warning.
Key Standard & Origin: The solid red circle with a horizontal white bar is an internationally standardized symbol recognized across Europe, Asia, and the Americas, ensuring that non-English speaking drivers instantly understand the entry prohibition.
Where You'll Find This Sign
Prominently installed at freeway exit ramp terminals, intersections with one-way streets, divided highway median crossovers, and bus-only transit malls.
Common Driver Mistakes to Avoid
Mistaking an illuminated freeway exit ramp for an entrance on-ramp at night or during heavy fog. Turning onto one-way streets in unfamiliar downtown cores without scanning for corner signage.
How This Sign Appears on the DMV Knowledge & Road Test
Heavily tested as an essential life-safety sign. Questions ask what the sign means (opposing traffic flow) and what immediate action is required (stop immediately and do not enter).
Legal Penalties and Moving Violations
Violating a Do Not Enter sign is prosecuted as reckless or wrong-way driving, resulting in $250 to $1,000 fines, 2 to 4 moving violation points, and potential license suspension.
Sign Variations & Related Types
Wrong Way Sign (R5-1a)
A secondary red rectangular sign placed further along the ramp to catch the headlights of wrong-way drivers.
Do Not Enter During Specific Hours
Used on reversible rush-hour lanes to indicate the lane is currently operating in the opposing direction.
When you encounter the official Do Not Enter (R5-1) on a roadway, what is your legal duty?
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