Originally, California’s road signs were black with white lettering, but the state changed them after a federal rule was extended to the states. A federal study found that blue-and-gold and ...

Originally, California’s road signs were black with white lettering, but the state changed them after a federal rule was extended to the states. A federal study found that blue-and-gold and ...

More: Black ice, a winter danger 'It happened so fast': Black ice turns roads into invisible skating rinks. That's why many highways sport "Bridge ices before road" and similar signs to caution ...