
Ponte Vecchio, Florence, Italy. Photo by Astrovine, courtesy of Flickr.
If we’re talking about slow, how about Florence’s Ponte Vecchio? Or Pulteney Bridge in Bath, England? Although the more built up a bridge is the more limited the river views. Both these bridges house little shops along the roadway; slowness along them is likely to come from being distracted by stuff to buy.

Pulteney Bridge, Bath, England. Photo by bridgink, courtesy of Flickr.
While shopping, would one forget that one had begun the journey to cross water?
Not sure of the relationship between slow and distracted. Isn’t slowness more about undistracted?
Hmm. Right. So the Ponte Vecchio and Pulteney Bridge might more likely be considered unslow bridges, or even fast bridges, if you just wanted to get somewhere on the other side of the river without being sidetracked by shopping.