After a second taxiing incident damaged the EMAS arrestor bed at the end of New Jersey’s Teterboro Airport Runway 6, the airport installed delineators to mark the bed. The EMAS, made of porous concrete by ESCO’s Engineered Material Arresting System Division, is marked with yellow chevrons per FAA guidance, but on October 25 a Challenger and on December 6 a Learjet taxied into the EMAS, both at night. The delineators are two-inch frangible plastic pipes with reflector tape mounted between the EMAS bed and the end of Runway 6. The FAA is evaluating the delineators to see if they should be installed at all EMAS-equipped airports.