Abstract: A floor protector for a garage floor or the like is formed as a unitary, monolithic sheet for placement in the parking area of a motor vehicle. The protector includes left and right inwardly sloping lateral surfaces, with a longitudinal channel or trough extending down the center of the device. The trough slopes rearwardly, to collect runoff from the lateral slopes and guide the runoff to the rear center of the device where it is removed from the protector and garage by a retractably extendable channel. The remainder of the rearward edge of the protector includes a raised, rounded dam with a central gap for the retractable channel, to preclude runoff from the device at any other point than the location of the central channel. The protector includes flat, level wheel or tire rest points inset in the lateral slopes, for assisting a driver in accurately positioning a vehicle on the device.