Revolutionary in 1927, the Double Threaded Helix ramp design is still rarely employed in large urban garages due to space constraints. Yet at the Motor Mart it allows patrons to rise two vertical levels while circling the garage only once, and combined with our Clearway Path travel lanes (no ramp parking), speeds vehicles directly to the nearest available space..Upon exiting, the Helix brings cars to either side of Park Square (Stuart St or Columbus Ave), wherever traffic is least.