from flying into the airport between midnight and 6:30 AM. Those that breach the VRFF are reminded of the initiative and notified of any noise complaints that may have resulted from their operations. The airport's Airport Noise and Operations Monitoring System (ANOMS) collects noise data from remote noise-monitoring terminals, and both registered aircraft and community noise levels are published in the Airport Monitor. This system works in conjunction with the High Range Noise Event (HRNE) Program; ANOMS staff can identity any operator who causes a maximum noise level event of 90.0 decibels or higher at any of its remote noise monitor terminals and advise them in order to prevent future noise level transgressions. As of September 2020, there are no fines, penalties, or aircraft restrictions associated with this program. Additionally, HPN prohibits intersection takeoffs from its runways and restricts maintenance runups and use of reverse thrust. It also employs Advanced Authorization for operations. Local context Following several renovations and discussions about the airport's viability, HPN is currently served by 5 airlines with flights to 20 destinations throughout the United States. Although there has long been controversy over the airport and its proposed expansions, concerns have also arisen regarding travelers seeking relief from long delays at the other New York metropolitan area airports, such as John F. Kennedy International Airport (JFK) and LaGuardia Airport (LGA). More recently, these concerns pertain to flight paths and vehicular congestion. The latter has been addressed by the County of Westchester with Bee-Line Bus System (bus #12 from downtown White Plains) service to the airport and the encouragement of travelers to share rides to the airport. The airport's environmental management performance is monitored through its ISO 14001 certified Airport Environmental Management System (AEMS). This enables operators to report the airport's impacts on surface water, groundwater, and noise. Airport-wide environmental management practices are also continually revised with this technology, and annual objectives and targets are determined to avoid or mitigate adverse environmental impacts. In addition, airport employees receive environmental training. In 2004, HPN was the third airport in the U.S. to achieve this level of environmental performance. In May 2011, the New York State Department of Transportation published the "New York Statewide Airport Economic Impact Study," highlighting the economic impacts of public-use airports in New York state for fiscal year 2009. The study noted that HPN was one of only three airports in the state that increased