A sinkhole on a New Jersey interstate that's closed eastbound traffic for over 24 hours was caused by a collapse of abandoned mineshaft, officials said.

Officials estimated that the depression stretched  40 feet wide and 40 feet deep. As of Thursday, all lanes of I-80 eastbound were closed, forcing travelers to find alternate routes, according to the New Jersey Department of Transportation.

The sinkhole is on the right shoulder of the eastbound side of I-80, but affects the right lane as well, officials say.