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The 40 MPH Speed Zone Ahead Sign is MUTCD compliant (MUTCD W3-5a) for safety protocol and compliance on roadways. A 40 MPH Speed Zone Ahead Sign is a useful legend to help warn drivers to start reducing speed.
Compliance
Section 2C.38 Reduced Speed Limit Ahead Signs
Guidance
- A Reduced Speed Limit Ahead (W3-5 or W3-5a) sign should be used to inform road users of a reduced speed zone where the speed limit is being reduced by more than 10 mph, or where engineering judgment indicates the need for advance notice to comply with the posted speed limit ahead.
Standard
- If used, Reduced Speed Limit Ahead signs shall be followed by a Speed Limit (R2-1) sign installed at the beginning of the zone where the speed limit applies.
- The speed limit displayed on the Reduced Speed Limit Ahead sign shall be identical to the speed limit displayed on the subsequent Speed Limit sign.
Source: 2009 MUTCD