Derry Township police and public works employees were called in during the overnight hours after a sinkhole was reported along Cedar Avenue.
Traffic was reduced to one lane for several hours while crews made repairs.
A few hours later, another sinkhole near a busy stretch of Route 322 created problems for drivers during the morning commute.
All of the sinkholes discovered Friday have been fixed.
Derry Township officials are asking people to be on the lookout for others and report any they find.