Began commuting ~30 miles each way to work on partial rail-trails and sidewalks this summer.
Starting to cut my time down to ~2 hours now (including stops @ intersections).
And its getting mightly chilly here during these Michigan mornings (~40-50 F).

Aside from people always seeming to block the sidewalks closer into the city, the ride is peaceful and I always arrive at work less stressed than those who drove!

Funny, I work in the automotive industry and highly promote cycle commuting to those I work with....

Enjoy =)