The bridge to Sanibel Island is probably the same height, to accommodate ocean traffic, but the flat part is much shorter, so only 2 miles? I also felt like it would be easy to flip over the rail on a windy day, Not my picture,

We started riding and because it's one-way, no turning back of you're a wimp, It was OK. Cars are 45 mph, I believe, Only one biker has ever been knocked off the causeway, as far as anyone knows, Was not looking forward to crossing it back, but it was uneventful.