Retractable ramp assembly for allowing people to enter vehicles

The ramp assembly is integrated and flush in an area of the floor of the vehicle adjacent to a door and is capable of adopting two end positions, a resting position, wherein a platform is hidden inside the vehicle, and an operative ramp position, wherein the platform is arranged on an inclined plane from the floor of the vehicle to a surface located at a lower height level from which people gain access. The ramp assembly is provided with a lifting mechanism in order to minimise the height difference between the floor and the rear side of the platform in the operative ramp position and comprises at least one rocker piece arranged articulately between movement transmission means and the platform, and at least one wedge that is in contact with a lower bearing.