Answer: tramlines

AnswerCrossword Clue
TRAMLINESLondon street car systems.
TRAMLINESTransportation systems.
tramlinesA pair of parallel lines, in particular the long lines at the sides of a tennis court (enclosing the extra width used in doubles play) or at the sides or back of a badminton court
tramlinesTRAMLINE, a line for a tram