You'd have a rough time on the Mackinac bridge in MI. The center two lanes are steel grating so you can see straight down. I usually use the concrete curb lane, mainly because the grating can be slippery.
2015 BMW R9T, 2010 Ducati 1098 Streetfighter S
2009 Kaw 650 Versys, 1967 Triumph 650 TT Special