No, roads/rails/maglevs don't add commerce bonuses anymore. Not sure if they did in CTP1 either. Made this mistake my first game untill I noticed that none of the AI opponets used roads except where they needed them. Then I checked both a road and non-road panel of the same type and the commerce amount was the exact same. Was none too happy about that seeing as how I had an entire continent covered with railroads.
Live and learn.
-Zane