Well, you know the airspace is getting crowded when the reliever airport needs a reliever airport. The New York Port Authority is trying to figure out how to get some of the 550 mostly corporate flights per day that operate from Teterboro Airport (TEB) to use Stewart International, a quieter but fully equipped former Air Force base about 60 miles away. An therein lies the problem. Execs going to the Big Apple via TEB endure about 20 minutes in a limo compared to the hour it would take to get them from Stewart. “Corporate aircraft are in demand because time is probably one of the most important aspects a company can have,” Jack Olcott, president of the New Jersey Aviation Association, told the North Jersey media group. Among the ideas being bandied about to entice corporate aircraft to Stewart are lower fees, helicopter shuttles to Manhattan and even a rail link to downtown. The Port Authority is under intense public pressure to reduce traffic at TEB, particularly in light of a spate of recent accidents. The Port Authority has promised to cut jet traffic by 10 percent but the FAA has already said it won’t allow that.