As I was staying over in Croydon last night, I had to ride back through the streets of the fair city (well town, anyway), and on my journey, I encountered a large number of motor vehicles in a line one behind each other, waiting patiently for the one in front to move, and I have it on good authority that "townsfolk" call it a traffic jam
Furthermore, some multicoloured lights on poles that seemed to alternate between red and green, with yellow inbetween - traffic lights
Guru P
From Horsham