Easy 5

This is a 120 m car bridge. I love this bridge for its absurdity. Originally, the road pointed upwards, but this caused the centre pillars to topple. Having the road dip lowered the centre of gravity and made the bridge remarkably stable. Unfortunately, it isn't the safest bridge for the car drivers (especially as they insist on accelerating wildly as they cross), so it can take a few attempts for the cars to cross successfully.