Emergency repairs are causing delays for motorists on the M1.
A lane has been closed northbound between junctions 41 at Carr Gate and 42 at Lofthouse, so that a damaged manhole can be repaired.
And the Highways Agency said it would not be reopened until tomorrow morning (Wednesday) at the earliest.
The northbound carriageway and entry sliproads at junctions 39 at Durkar and 40 at Flushdyke will be closed tonight from 8pm until tomorrow at 6am, because of work being done on the new £120m smart motorway scheme.
Traffic will be diverted along the A636, A6186, A61 and A650.
For up-to-date information about motorway work, call the Highways Agency information line on 0300 123 5000.