R4-12 Slow Vehicles With XX or More Following Vehicles Must Use Turn-Out Sign Size:42" x 24" Available mounting for

Available mounting for

MUTCD Sign Designation: W21-7

Silver Lap-Splice U-Channel Break-Away Kit

Welded Steel

R4-12 Slow Vehicles With XX or More Following Vehicles Must Use Turn-Out Sign Size:42" x 24" Available mounting forR4 12 Slow Vehicles With XX or More Following Vehicles Must Use Turn Out Sign Sizes Available: 42" x 24" MUTCD Sign Designation: R4 12 Traffic signs match MUTCD Highway Sign Standards. Signs are made with reflective sheeting applied to . 080" aluminum with rounded radius corners and pre punched 3 8" holes to meet Federal MUTCD, ASTM and ATSSA specifications. Aluminum: Aluminum is . 080 Aluminum #3105 H38 Alodine coated. Reflective Sheeting: 3M 3930