Delays on Horbury Bridge are expected to continue over the next few days.
Temporary traffic lights are in place while emergency work is carried out following an accident.
They were expected to be removed today but work will now continue until 10pm on Thursday.
Motorists faced further disruption this morning (Tuesday) when firefighters were called to the Riverside Industrial Estate just after 7am.
Crews from Ossett, Wakefield and Dewsbury stopped the blaze from spreading but the incident caused lengthy traffic delays.