A do not enter sign is a regulatory sign that prohibits traffic from entering a restricted roadway, ramp, or lane. The standard MUTCD R5-1 do not enter sign is a white square with a red circle and a white horizontal bar, reading "DO NOT ENTER." It warns a driver that traffic is approaching and that they must not enter to avoid a head-on collision.
A do not enter sign (R5-1) is the primary "keep out" signal, posted at the point where a driver could wrongly enter a one-way road or ramp. A wrong way sign (R5-1a) is a secondary deterrent placed farther along the ramp or road to catch a driver who has already entered. The wrong way sign supplements the "Do Not Enter" sign rather than replacing it, and the two are used together to prevent head-on collisions.
Do not enter signs are posted at the entrance to one-way streets, exit and off ramps, and parking-lot exits. Per MUTCD Section 2B.37, a do not enter sign is mounted on the right-hand side of the roadway, facing traffic that might enter in the wrong direction, and shielded from traffic it doesn't apply to. In business and residential areas, the sign is at least 7 feet above the pavement edge.
MUTCD Section 2B.37 (Figure 2B-11) defines the do not enter sign as the R5-1: a square white sign with a solid red disc, the words "DO NOT" and "ENTER" in white above and below a thick white horizontal bar. A do not enter sign used on a public road must meet these R5-1 specifications and the FHWA minimum retroreflectivity levels.
The standard MUTCD do not enter sign is 30" x 30", with larger sizes used on multi-lane and higher-speed roads. For private drives, parking lots, and low-speed areas, do not enter signs are available from 12" x 12" up to 36" x 36".
Driving past a do not enter sign means traveling against the right-of-way into oncoming traffic, which is a moving violation on a public road and can bring a traffic citation. Beyond the ticket, ignoring a do not enter sign risks a head-on collision. On private property, a "do not enter" sign is posted by the owner to control access and traffic flow.
Do not enter signs are made from rust-free.080" aluminum faced with 3M reflective sheeting that meets ASTM D4956, in Engineer Grade, High Intensity Prismatic, or Diamond Grade. The reflective grade sets how brightly a do not enter sign returns headlights at night, and the aluminum keeps the sign from rusting or fading for 10 or more years outdoors.
Yes - do not enter signs are widely used in parking lots, retail and commercial buildings, and workplaces to keep vehicles or people out of restricted areas like storerooms, staff-only zones, and data centers. Note that decorative "designer" do not enter signs are not MUTCD-compliant and should be used on private property only, not public roads.
OSHA does not name do not enter signs specifically, but their use is implied to keep workers out of hazardous or restricted areas. In a workplace, a do not enter sign is often paired with the correct OSHA header - Danger, Warning, Caution, or Notice - to match the severity of the hazard behind the door or gate.
Custom do not enter signs are made to order and generally take 3 to 5 business days in production before shipping, with the order released the next business day after you approve the proof. Standard, in-stock do not enter signs ship faster.
We are leading maker of do not enter signs. A do not enter sign is the MUTCD R5-1 regulatory sign - a red circle with a white horizontal bar on a white square - that tells drivers a road, ramp, or lane is closed to them. That red-circle-and-bar symbol is built for instant recognition without language, so a driver reads "keep out" before reading a single word. Traffic engineers and property owners post do not enter signs at one-way streets, exit ramps, and parking-lot exits to stop wrong-way drivers before a head-on collision.
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