That's in the area where they were experimenting with foam under the pavement surface to prevent issues like this from happening in the first place. Well, it's didn't work needless to say.
Not only that, but the foam layer insulates the pavement in the Winter allowing the road to freeze up in much the same manner as to a bridge (WARNING BRIDGE ICES) Old Mother earth's warming qualities were never more missed.
Railton
PS.excerpt from original study
"It is also well ltnown that surface deflection in flexible pavements due to traffic
loads is at a maximum after thawing occurs and is at a minimum in the period preceding
the next winter. This characteristic deflection rhythm is repeated each year although
it is not well understood when no frost heaving occurs."
http://www.nrc-cnrc.gc.ca/obj/irc/doc/pubs/rp/rp375/rp375.pdf
