An old railroad car powered manually by alternately pushing and pulling on the lever situated in the center. Used as a means of rail maintenance or as a mining car, easily carrying supplies and workers, but it can also be a means of solo transportation.
A handcar can be found in the train tunnel, and can be used for the treacherous journey to and from the Pitt using the remnants of the extensive rail network stretching across most of the country especially the heavy industrial center of Pittsburgh which used railways to easily transport large amounts of ore and steel into and out of the area.
Fallout: New Vegas
A handcar is located at the emergency service railyard, derailed next to the platform.