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Reduced Speed Limit 45 MPH Signs are MUTCD Compliant (MUTCD W3-5) and identify that the speed limit will be dropping by more than 10 mph soon and to slow down. A Reduced Speed Limit 45 MPH 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