It all began around 10:52 a.m. at Frankford and Cottman avenues.
The vehicle hit a pole, which struck a gas line, causing a leak.
PGW arrived shortly after the crash and the incident was placed under control.
About 60 children had to be evacuated from a nearby day care as a precaution. They were allowed back inside around noon.
Some streets in the area were shut down after the crash, but they have since reopened.