Add Yahoo as a preferred source to see more of our stories on Google. An example of what variable speed limit signs look like above a highway in Washington. (Courtesy of the Washington State ...

FRESNO, Calif. (KFSN) -- An ABC30 viewer sent in the following question: are speed limits posted on yellow signs enforceable? "It's merely an advisory sign. It's a suggested speed that the engineers ...

CLEARFIELD, Pa. - Newly released data shows that variable speed limit signs installed along Interstate 80 in Mercer County and other parts of the state have helped reduce winter traffic accidents and ...