Photos Another Accident on I-287 At Mount Airy Rd.Causing Multi-mile Delays on Aug.14 Brenda A. Nemcek Thursday, August 14, 2014 • 8:20am Content Options SOMERSET COUNTY, NJ - Different day, same problem. An accident is causing heavy delays on I-287 at approximately Exit 26, Mount Airy Rd. A multi-mile delay is being reported. The right shoulder of the roadway is closed. Avoid the area if possible. TAP into your town! Get Your Town's News In Your Inbox: Click here to sign up.