Metro-North: Valhalla has a small two-track commuter rail station, served hourly. There is no active taxi stand if you require car transport from this station, you will need to call a taxi upon arrival or schedule a pick-up ahead of time. The main village drag is across the street, with a few delis, gas station and a post office. The Valhalla station is on the Harlem line of the Metro-North. Ticket machines are located in the overpass, where both single tickets and passes available for purchase. http://www.mta.info/mnr/
Westchester Bee-line: several bus routes serve Valhalla, particularly to the Westchester Medical Center. Buses accept the NYC Metro pass.