The Massachusetts Port Authority has begun a seven-month closure of Runway 15R/33L at Boston Logan International Airport for resurfacing and to complete Runway Safety Area (RSA) construction at the departure end of Runway 15R. Following daily closures this month, the runway will be completely closed starting about June 15 through late September, ending with daily closures again in October and November. The enhanced RSA will extend the existing Engineered Material Arresting System (EMAS) bed to a total of 500 feet.