I don't like bridges in a car and not much better on a bike. High bridges that are snow covered and slippery like we have in WI are the worst. (Not very fond of big drop offs). Rails help but if there were a lot of wind if I were on my bike, I'd want to be smack dab in the middle, not on the side in a bike lane!

Lise, I'm not sure mtn biking helps. I went out the other day on a technical trail and there are these wood planks (no rails or sides) about 3 ft wide over canals in the trail and I waled each one!! Yes, I'm a chicken but I have not mastered "look to where you WANT your bike to go" -- I know I will look at the water and PLOOOOOOSH!!! in I will go. It's not like they are deep but they can be very mucky ugly dirty.....