WASHINGTON, March 6 -- The U.S. Department of Transportation's Federal Aviation Administration issued the following fact sheet: The Federal Aviation Administration (FAA) actively worked to improve runway safety areas (RSAs) at commercial service airports by the end of 2015. The RSA is typically 500 feet wide and extends 1,000 feet beyond each end of the runway. It provides a graded area in the event that an aircraft overruns, undershoots, or veers off the side of the runway. Many airports were   more