Photos Accident On Route 287 Snarls Traffic Brenda A. Nemcek Tuesday, May 20, 2014 • 6:03pm Content Options SOMERSET COUNTY, NJ- An accident has been reported on Route 287 south at approximately exit 26 Mt. Airy Road. Traffic is heavy at this time.if possible use the Maple Ave. exit. TAP into your town! Get Your Town's News In Your Inbox: Click here to sign up.