<P> Two municipalities in the state of Rhode Island, Bristol and Warwick, replace the double yellow line with red, white, and blue striping along certain routes . </P> <P> In some states, it is not against the law to overtake vehicles in the presence of solid yellow lines if it is safe to do so . For example, Vermont State Law also allows passing across the double yellow line when no traffic is on the opposing side, however, one must pass quickly and return to the proper side . Pennsylvania does permit passing on double yellow lines when not also posted with "Do Not Pass" signage . However, this is unusual as most states have a ban on crossing a double yellow line except when turning, when passing pedestrians or bicycles, or if an obstruction in the road makes it necessary . Overtaking another vehicle across a solid yellow line is usually considered a serious traffic violation in most states . </P> <P> Some parts of the US use a doubled set of double yellow lines to demarcate a painted median strip, which vehicles are not permitted to cross . This differs from a single set of double yellow lines, which may be crossed in certain circumstances . </P>

When were double yellow lines first used in oxford