Apparently, this is all due to the Grate York-sure show which is being attended by such a HUGE number of 2-foots that the roads are all blocked by their boxes-on-wheels. Millie and I have been discussing this, and for the life of us we can't figure out why the 2-foots find grates so fascinating that they have to hold this huge show and turn out in considerable numbers to attend it.
I knew we should not have given up on the idea of chip-munks as pets instead...