A ramp assembly (114, 212, 1400) for use to accommodate a wheel-chaired passenger to enter or exit a motorized vehicle, comprising: a ramp body (300, 1414) having a length defined along a longitudinal direction, the ramp body (300, 1414) including a first side, a second side, a first end and a second end (314, 2202); a first side rail (302, 1418) pivotably coupled to the ramp body (300, 1414) along the first side; a second side rail (304, 1420) pivotably coupled to the ramp body (300, 1414) along the second side; a hinge plate (510, 2204) pivotably coupled to the ramp body (300, 1414) at the first end; a first arm (1106, 2306) coupled to a bottom surface (1100, 2302) of the ramp body (300, 1414), the first arm (1106, 2306) including a first roller wheel (1110, 2308); and a second arm (1108, 2310) coupled to the bottom surface (1100, 2302) of the ramp body (300, 1414), the second arm (1108, 2310) including a second roller wheel (1112, 2314); wherein, the first side rail (302, 1418) and second side rail (304, 1420) are pivotably moved between a folded position in which the first and second side rails (302, 304, 1418, 1420) pivot inwardly and a raised position in which the side rails (302, 304, 1418, 1420) are oriented perpendicular to the ramp body (300, 1414); wherein, the first arm (1106, 2306) operably pivots the first side rail (302, 1418) between its folded and raised position, and the second arm (1108, 2310) operably pivots the second side rail (304, 1420) between its folded and raised position; further wherein, the ramp body (300, 1414) moves between a stowed position and a deployed position, the first and second side rails (302, 304, 1418, 1420) being in their folded position when the ramp (300, 1414) is in its stowed position and in their raised position when the ramp (300, 1414) is in its deployed position. a ramp body (300, 1414) having a length defined along a longitudinal direction, the ramp body (300, 1414) including a first side, a second side, a first end and a second end (314, 2202); a first side rail (302, 1418) pivotably coupled to the ramp body (300, 1414) along the first side; a second side rail (304, 1420) pivotably coupled to the ramp body (300, 1414) along the second side; a hinge plate (510, 2204) pivotably coupled to the ramp body (300, 1414) at the first end; a first arm (1106, 2306) coupled to a bottom surface (1100, 2302) of the ramp body (300, 1414), the first arm (1106, 2306) including a first roller wheel (1110, 2308); and a second arm (1108, 2310) coupled to the bottom surface (1100, 2302) of the ramp body (300, 1414), the second arm (1108, 2310) including a second roller wheel (1112, 2314); wherein, the first side rail (302, 1418) and second side rail (304, 1420) are pivotably moved between a folded position in which the first and second side rails (302, 304, 1418, 1420) pivot inwardly and a raised position in which the side rails (302, 304, 1418, 1420) are oriented perpendicular to the ramp body (300, 1414); wherein, the first arm (1106, 2306) operably pivots the first side rail (302, 1418) between its folded and raised position, and the second arm (1108, 2310) operably pivots the second side rail (304, 1420) between its folded and raised position; further wherein, the ramp body (300, 1414) moves between a stowed position and a deployed position, the first and second side rails (302, 304, 1418, 1420) being in their folded position when the ramp (300, 1414) is in its stowed position and in their raised position when the ramp (300, 1414) is in its deployed position.