Construction begins today on Runway 6/24 at Trenton Mercer Airport (KTTN), New Jersey, that will significantly restrict its use. The work, to install engineered material arresting systems (Emas) on both ends of the runway, will continue until November 8. Some approach and runway lighting and instrument approach systems will be unavailable and the runway will be closed to aircraft with approach speeds greater than 121 knots. The runway’s usable length will also be shortened by more than 750 feet. Construction work will be under way for approximately 20 hours each day.