There will be overnight lane closures this week on the Blue Route in Delaware and Montgomery Counties for conduit installation and construction of crossover lanes in the median, the Pennsylvania Department of Transportation said.

The work will be done from 10 p.m. to 5 a.m. Weather permitting, the schedule is:

Through Wednesday: The northbound and southbound left lanes will be closed between the Interstate 76 and Ridge Pike interchanges in Montgomery County.

Today and tomorrow: The northbound and southbound right lanes will be closed just north of the MacDade Boulevard interchange in Delaware County.

Tomorrow and Wednesday: The northbound and southbound right lanes will be closed just south of the I-76 interchange in Montgomery County.

Thursday and Friday: The northbound and southbound right lanes will be closed at the Ridge Pike interchange in Montgomery County.