PITTSBURGH (KDKA) — A water main break caused a major disruption for commuters in the North Hills after crews had to shut down McKnight Road for hours this morning; but part of the busy thoroughfare is back open to traffic again.

McKnight Road was closed to traffic between Siebert and Peebles Roads; but PennDOT re-opened the southbound lanes of the roadway around 9:30 a.m.

According to Jim Struzzi from PennDOT, one northbound lane is also now open; but two northbound lanes are still closed for now.

Struzzi says those northbound lanes “will remain closed until repairs are completed.”

Approximately 40,000 vehicles travel on the busy roadway every day, so the closure has been causing a major disruption for drivers.

Crews also responded to another water main break on nearby Perry Highway; and police have been busy dealing with the traffic issues caused by the restrictions.

Officers were also dispatched to alert parents and kids that their school buses may be late or even unable to reach the stops.

The North Hills School District announced that students in the Johanna/Teal Trace area and Waldorf Apartments would not have bus service this morning. In addition, the district warns that other buses will likely be running late.

Ross Park Mall also shut down with the earlier closure of McKnight Road; but the mall reopened at 10:30 a.m.

At this point, though, it is still not clear when the road will completely reopen to traffic.

Stay with KDKA for more on this developing story