For two years, while Interstate 10 was under construction through downtown Tucson, the only saving grace for drivers forced to use the crowded frontage roads was not having to worry about merging with ...

Drivers throughout the country see -- and most observe -- a yellow triangular sign every day that was invented by a Tulsa policeman. Variations of it have been adopted in other countries. The "yield" ...

TULSA — The first yield sign was invented in Tulsa by a police captain. One of the original signs is on display at the Tulsa Historical Society. Director of Exhibits Maggie Brown says in the 1950s, ...