$30/month, but free with a student ID. Hopefully I'll get a bicycle put together so I can start riding when the weather warms up.
I decided not to get a parking permit, ($175/yr), so I have to ride the bus or pay for hourly parking. That makes riding the bus the most convenient option, and being lazy, I usually do whatever's most convenient.
I used to drive 25,000+ miles a year, now probably under 10,000. Saves me so much money, I can buy better tires for the race car.