Here’s a little pavement marking trivia: The Minneapolis Park Board uses the color green to stripe the centerlines on their off-street trails. All the design guidelines I’m aware of would recommend yellow for centerline stripes separating two-way traffic.
So why does the park board use green?
Bruce Chamberlain, Assistant Superintendent for Planning at the MPRB said the following:
The green center line stripe has been the Minneapolis Park & Recreation Board design standard for bike and walking paths since before I first came to work here in 1980. As I recall I was told the intent of the green center line stripe was to distinguish the MPRB walking and bike path system from the road system, and was intended to distinguish the MPRB system from other systems and help users find their way on the MPRB system. Like the unique signage we use and the unique lighting poles and fixtures we use.