WHARTON, N.J.—Road crews were repairing a short stretch of Interstate 80 in northern New Jersey on Friday where a sinkhole forced the eastbound lanes to shut down, but it was still unknown when they will reopen. The highway’s guardrail still hung suspended in the air across the gaping 12-meter hole, which opened up when an abandoned mine collapsed under the highway’s right shoulder Thursday morning, according to the New Jersey Department of Transportation. The sinkhole has forced motorists to take a short detour near Wharton, which is about 64 kilometers west of New York City. Crews have stabilized the area and started excavating. They will work around the clock to the repair the roadway, the highway department said Friday….