Bridge blockers

you're driving along and
 get to a bridge, suddenly
the roadsides are built up
so you can't look over and
see the water as you
cross the bridge.
what did they do that for?
 no need to see
the river when crossing ...
you might enjoy the view too much.
it's enchanting, for sure.
a while back some nitwits
thought it distracting;
takes your mind off boredom.
if you have a good thought you
might want to return; the town folk
 prefer you just keep going.