Instead of having to use layers and triggers and secrets to create the illusion of a bridge, why not have a combo type that is a bridge.
There could be specific combos that could be a bridge, working in conjunction with an overbridge combo and an underbridge combo. Placing the over and under combos acordingly would automatically draw the bridge combos on the correct layer.
Eliminating the use of tricks, secrets, and warps. This would leave room for other secrets and tricks in a room that an author might want to use.