Kevin's automated Bascule bridge supports two parallel 9V tracks. The bridge rises to permit NALUG members to walk into the center of the layout. A LEGO RCX powers two motors that drive Lego racks mounted on the bridge truss. Light sensors determine when these motors should be powered off. When it is lowered, the 9V motors use electrical braking to ensure a gentle operation.
When the bridge is raised, the power to the approaching tracks is cut off automatically by the RCX to prevent trains from crashing into the counterweight of the bridge or falling into the chasm!
The locals are not at all impressed by the technical aspects of the bridge - they just think its a cool place to bungee jump from!
