Abstract: A device is provided for releasably securing a parked vehicle to an adjacent structure. The device is provided with a first member hingedly mounted for movement between an operative mode and an inoperative mode. When the first member is in an operative mode the distal end thereof will releasably engage a portion of the parked vehicle and retain same in a desired position relative to the adjacent structure. When the first member is in an inoperative mode, it assumes a vehicle-release position. The first member is provided with means for moving same from the inoperative mode to the operative mode. A further means is provided for automatically locking the first member in an operative mode. The further means includes a means for effecting controlled unlocking of the first member whereby the latter will automatically return to its inoperative mode.