Two lanes are closed and there is queueing traffic on the M62 eastbound between J25, A644 (Brighouse) and J26, M606 (Chain Bar), because of an accident involving a lorry.
It is understood a flatbed truck jack-knifed after experiencing problems with its brakes and crashed at the near side of the motorway.
No other vehicles were involved and no-one is believed to have been injured.
Traffic is also slow on the A58 Wharf Street in Sowerby Bridge in both directions at the A6139 Tuel Lane junction.
The A629 Cow Green in Halifax is busy but moving in both directions at the Bull Green junction.