The present disclosure provides a modular transit system having a track system and/or modular seating that can be used to modify a transit car. The track system can support a variety of attachments to allow the transit car to be reconfigured. According to one embodiment of the present invention, an adjustable furnishing system is de-mountably mountable to a generally vertical wall. The adjustable furnishing system comprises a mounting structure carried by the wall, a support frame having opposite first and second ends, and a furnishing carried by the support frame. The first end of the support frame releasably attaches to the mounting structure and the mounting structure supports the support frame in a cantilevered position with the second end extending outwardly from the wall with the furnishing carried thereon.