Hour-long delays and bus cancellations in another night of Leeds traffic chaos
Leeds buses are facing delays of up to an hour and forced cancellations are likely, First Bus has said.
The worst affected services are the 4, 5, 11, 15, 16, 19/19A, 35, 54, 55 and 91.
Bus operator Flying Tiger has also warned of delays.
A seven vehicle crash on the M1 late on Wednesday afternoon contributed to the gridlock in Leeds, particularly on the M621.
A broken down vehicle on the Inner Ring Road also caused problems, according to Leeds Travel Info.
There has also been an accident on Seacroft's The Green, with buses being diverted.