Day classes are done at 5pm, night classes are usually 9:30pm. The train is very safe and I wouldnt worry about it.
I highly recommend looking at the Kellogg thread in the applicants area and try to ask questions there, it gets a lot more traffic than this and its nice to try to capture questions and answers in one location so everyone can find it easily.
Kellogg Class of 2010...still active and willing to help. However, I do not do profile reviews, don't offer predictions on chances and am far to busy to review essays, so save the energy of writing me a PM seeking help for these. If I don't respond to a PM that is not one of the previously mentioned trash can destined messages, please don't take it personally I get so many messages I have a hard to responding to most. The more interesting, compelling, or humorous you message the more likely I am to respond.