60 miles per day, but I'm multi-modal and my company subsidizes the bus system by paying for all but $15 of my monthly pass. They also pay for part of parking if you choose to drive, but you end up paying $50 a month for a spot that would cost you $75-$90 otherwise. That's a savings of an additional $35 a month or $420/year. I'm saving 8,670 annually, which, when you count the bus ride, is 3 hours per day.
That's more than $11 per hour in my pocket while I'm on the road to and from work. While that's a pittance compared to what I make driving my desk for a living, money's money and I'd be lying if I didn't say I already did the numbers and it's one of the main motivators behind why I keep doing this.