Regulatory signs
No Left Turn sign
You may not turn left at this location. Continue straight or use another route.
- Square
- White
- MUTCD R3-2
Shape and background first
Federal designation R3-2 in the MUTCD, the national standard every state signs to. Posted at intersections where a left turn would cross opposing traffic without a protected signal phase, or where the cross street is one-way against the turn.
What the MUTCD specifies
Designation: R3-2
MUTCD Section 2B.26
Conventional road size: 24 x 24 in
Standard: Install a movement prohibition sign where left turns are prohibited on an intersection approach, subject to the section's exceptions.
Source: Federal Highway Administration, MUTCD 11th Edition (December 2023), Part 2, Table 2B-1; Section 2B.26, verified 2026-09-26.
What the test wants you to know
The mistake people make
This sign bans the turn at all times unless a plaque underneath narrows it to certain hours, so do not assume it is only active during rush hour. It is a frequent one-way street companion, since turning left onto a one-way road often means turning straight into oncoming traffic.
