No Left Turn Signs | Official MUTCD R3-2

Our No Left Turn Signs provide clear, highly visible traffic control for intersections, access points, and private drives where left turns create safety risks or congestion. Each sign is printed on heavy gauge reflective aluminum engineered to withstand sun, rain, impact, and continuous outdoor exposure. These signs meet all MUTCD standards for symbol clarity and layout, making them suitable for city streets, commercial sites, parking facilities, and controlled access areas.

Property managers, contractors, and safety teams rely on these regulatory signs to reduce collisions, guide drivers through constrained traffic patterns, and keep traffic flowing as intended. Whether you need a single sign for a private driveway or bulk quantities for roadway projects, our No Left Turn Signs deliver consistent visibility, long service life, and dependable on site performance.
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Strategic Intersection Placement for Turn Prohibitions (MUTCD Figure 2B-4)

Effective enforcement of a turn prohibition requires that the regulatory sign be visible to every driver in the approach lanes, regardless of traffic density. This diagram illustrates the standard two-sign "gate" configuration mandated for signalized and unsignalized intersections.

  • Position 1 (Primary - Near Right Corner): The first No Left Turn (R3-2) sign is installed on the near right side of the intersection, often mounted below a STOP (R1-1) or YIELD (R1-2) sign. This is the standard regulatory location.
  • Position 2 (Secondary - Far Left Corner): A second, redundant R3-2 sign must be installed on the far left corner of the intersection or on the median nose.
  • The "Gate" Effect: This dual placement creates a visual "gate." If a large truck or bus is in the right lane, blocking the view of the primary sign at Position 1, the driver in the left lane will still have a clear line of sight to the secondary sign at Position 2, ensuring the prohibition is communicated and legally enforceable.

Federal Standards for R3-2 No Left Turn Signs

Controlling turning movements is essential for maintaining capacity and safety at signalized intersections and high-volume driveways. No Left Turn Signs (R3-2) are regulatory devices that legally prohibit a left turn movement. Under MUTCD Section 2B.18, these signs must be placed conspicuously to warn drivers before they commit to the turn lane. Failure to post compliant signage renders the restriction unenforceable by police.

The R3-2 Symbol vs. Text

  • R3-2 (Symbol): The universal standard. Features a black left turn arrow inside a red prohibition circle with a diagonal slash. This pictorial sign is recognized faster than text and is mandatory for most federal-aid highway projects.
  • Text Alternatives: While the symbol is preferred, text signs like "NO LEFT TURN" are often used in parking garages or private property applications where specific clarity is needed for pedestrians or low-speed traffic.

Placement for Maximum Enforcement

A single sign is often missed by distracted drivers. The MUTCD recommends a multi-sign approach for intersections:

  • Near Right Corner: Place one R3-2 sign on the right-hand side of the intersection (where a Stop sign would be).
  • Far Left Corner: Place a second R3-2 sign on the far left corner (across the intersection) or on a median. This ensures the driver sees the prohibition even if their view of the right corner is blocked by a bus or truck.
  • Overhead: For multi-lane roads, mounting the sign on the mast arm next to the traffic signal provides the highest visibility.

Related Restrictions: U-Turns and Entry

  • No U-Turn (R3-4): Often paired with No Left Turn signs at median crossovers.
  • No Turns (R3-3): Prohibits both left and right turns, effectively forcing traffic to go straight.
  • Wrong Way (R5-1a): Essential for preventing left turns into one-way streets.

Reflectivity for Night Operations

Turn restrictions are often most critical at night to prevent head-on collisions.

  • High Intensity Prismatic (Type IV): The standard for all regulatory turn signs. It ensures the red prohibition circle reflects brightly against headlights.
  • Diamond Grade (Type XI): Recommended for overhead signs or intersections with high glare from streetlights and businesses.

Frequently Asked Questions

Common questions regarding MUTCD compliance, installation standards, and material specifications for regulatory signage.
Can I use a "No Left Turn" sign for a private driveway?

Yes. If you own a business on a busy road, installing a No Left Turn Sign at your driveway exit protects you from liability. Left turns out of private driveways across multiple lanes of traffic are a leading cause of "T-Bone" accidents. Posting the sign directs customers to turn right and U-turn safely elsewhere.
What size sign do I need?

  • 24" x 24": The federal minimum for conventional single-lane roads and parking lots.
  • 30" x 30": Recommended for multi-lane boulevards and city streets.
  • 36" x 36": Required for high-speed highways or overhead mounting where legibility distance is critical.
Is the "No Left Turn" sign regulatory or warning?

It is Regulatory (R-Series). It establishes a traffic law. Disobeying a No Left Turn Sign is a moving violation subject to fines and points on a license. Warning signs (Yellow) only advise of hazards; Regulatory signs (White/Red/Black) compel action.

Need specific code assistance?

If your project requires a specific State DOT certification or a specialized variation not listed here, please contact our Compliance Support Team for a custom specification sheet.