Stop Sign, Official MUTCD Compliant "Stop" Sign (Part#: STOP1000) Standardize your safety with official-spec R1-1 Stop Signs. ✱ Marks MUTCD Compliant Sizes. Roadway Compliance: Select .080" Aluminum & Hi-Intensity or Diamond Grade. • Pro Standard: Heavy-duty, rust-free .080"... MSRP: Was: Per Quantity: Now: $5.94 - $332.46