The recent sinkholes on I-80 were caused by long-abandoned mines. See the map showing hundreds of closed New Jersey mines.

NJDOT is considering a change to Route 80 traffic flows with a crossover to allow eastbound motorists to use the highway ...

Mine Hill Mayor Sam Morris said he and other municipal leaders ... the region that date back to the 18th century. That current sinkhole site is just 75 feet west of another that closed Route ...