There is a significant amount of... pet exhaust

on the streets. most of the dog owners I've seen do curb and clean up after their dogs, but the amount on the sidewalks suggests that many, many dogs don't come out until nighttime...
--keeps you from dragging your feet when you walk!

On a different note, I've seen a few cr125's over here, as well as what looks like a hybrid dirt/road honda with very large tires.
hym