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Right Combination Turn / Advisory Speed Signs are MUTCD compliant (MUTCD W1-1aR) and indicate a sharp turn with a speed advisory. The combination nature of the sign helps warn drivers to prepare for turns and to reduce speed when approaching. Signs are not fluorescent yellow.
Compliance
Section 2C.10 Combination Horizontal Alignment/Advisory Speed Signs
Option
- The Turn (W1-1) sign or the Curve (W1-2) sign may be combined with the Advisory Speed (W13-1P) plaque (see Section 2C.08) to create a combination Turn/Advisory Speed (W1-1a) sign or combination Curve/Advisory Speed (W1-2a) sign.
Option
- The combination Horizontal Alignment/Advisory Speed sign may be used to supplement the advance Horizontal Alignment warning sign and Advisory Speed plaque based upon an engineering study.
Standard
- If used, the combination Horizontal Alignment/Advisory Speed sign shall not be used alone and shall not be used as a substitute for a Horizontal Alignment warning sign and Advisory Speed plaque at the advance warning location. The combination Horizontal Alignment/Advisory Speed sign shall only be used as a supplement to the advance Horizontal Alignment warning sign. If used, the combination Horizontal Alignment/Advisory Speed sign shall be installed at the beginning of the turn or curve.
Guidance
- The advisory speed displayed on the combination Horizontal Alignment/Advisory Speed sign should be based on the advisory speed for the horizontal curve using recommended engineering practices.
Source: 2009 MUTCD