A ramp assembly includes an elongated frame sized and shaped to extend between a first door and a second door aligned opposite each other on opposed sides of a vehicle; a first sectional ramp section having a first end and a second end; and a second sectional ramp having a first end and a second end. The first sectional ramp is slidably moveable along the frame from a stored position to a deployed position on either of the opposed sides of the vehicle. The second sectional ramp is positioned adjacent the first sectional ramp and is slidably moveable along the frame from a stored position to a deployed position on either of the opposed sides of the vehicle. The ramp assembly also includes a first locking mechanism coupled to the first end of each of the first sectional ramp and the second sectional ramp; and a second locking mechanism coupled to the second end of each of the first sectional ramp and the second sectional ramp. The first locking mechanism is placed in a locked position and the second locking mechanism is placed in an unlocked position to allow the first and second sectional ramps to be coupled together and moved from the stored position to the deployed position through the first door. The second locking mechanism is placed in a locked position and the first locking mechanism is placed in an unlocked position to allow the first and second sectional ramps to be coupled together and moved from the stored position to the deployed position through the second door.