From Longman Dictionary of Contemporary Englishyellow lineˌyellow ˈline noun [countable] TTRa line of yellow paint along the edge of a street in Britain which means you can only park your car for a short time or at particular timesdouble yellow lines (=two lines of paint that mean you cannot park there at any time)
Examples from the Corpus
yellow line• And collapse in the center of the boulevard, on the double yellow line.• I had to drive over the double yellow line to pass them.• A golden yellow line replaces that of the Redline Rasbora, and follows an almost identical path from nose to tail. 