Generic bridge

thingiverse

I've come up with a 3D design inspired by a Google search for a picture of a bridge, which I've included as a reference point. This model is notable for its unique feature - it can be folded together without needing any adhesive, though you can choose to glue it if that's your preference. One of the interesting aspects of this design is that it can be flipped over and turned into a different style of bridge, offering users a bit more creativity in their building process.