If you came here looking for US Highway construction updates on Google Maps, I don’t think that particular mashup has yet been created.
I am traveling from Lake le Homme Dieu, MN to Chicago, IL by car today and searched for an up to date map – ideally on Google Maps – of the construction zones I will encounter along the way.
The US Department of Transportation has a National Traffic and Road Closure site that links to each individual states traffic information sites.
However, each respective state and local road construction updates data hasn’t yet been mashed up into a real time Google US Highway Construction Updates Map.
There is probably a business model in this idea.