It's the only traffic sign shaped this way. However, when it was first included in the 1954 revision of the 1948 Manual on Uniform Traffic Control Devices (MUTCD), it was a yellow with black Yield ...

Since the 1950s, all stop signs in the U.S. have been required to be red, as outlined in the Federal Highway Administration’s Manual on Uniform Traffic Control Devices (MUTCD). The red color was ...

The most recent edition of the MUTCD, published by the Federal ... that the PennDOT does not allow the city's traffic committee to install a stop sign to reduce speeding. Council member Bill ...