The passing lane on southbound Interstate 79 has been closed near U.S. Route 422 in Butler County.

The lane restriction is a precaution after an oversized vehicle struck a support beam while traveling underneath on Route 422.

PennDOT bridge inspectors are on the scene and will do an inspection to determine what repairs are needed, spokesman Shawn Houck said.

First Published: March 4, 2010, 5:15 p.m.