Commuting from Windsor to Ann Arbor (Michigan)

[RT]

Hi!

I am thinking of commuting everyday from Windsor to Ann Arbor (Michigan). I am trying to evaluate the feasibility of daily commuting. I am a Canadian PR and would be studying at the University of Ann Arbor.
I would like to know how much is the practical commute time?. Ann Arbor is about 50 miles (80 kms) from Windsor. Are the roads OK during winter? If I apply for a NEXUS card, then how much is wait at the border crossing? What are peak traffic times?  If I buy the car in Canada, do I have to make some changes in the car to drive it in USA?
I greatly  appreciate your help.

Thanks a lot!
RT.