PennDOT - District 6 News: Bethlehem Pike Lane Closure Due to Sinkhole in Springfield Township, Montgomery County (https://www.penndot.pa.gov/regionaloffices/district-6/pages/details.aspx?newsid=8603)
Another sinkhole affecting a major road in Montgomery County. First US 202 in King of Prussia, now this.
There seems to be a major limestone formation along the Turnpike in the Philly area. You have issues in the Valley Forge/KOP area, supposedly Mid-County required a lot of remediation during construction, and now this east of there