via NY Times
"Under a more sensible policy, a parking space that is currently free could cost at least $100 a month — and maybe much more — in many American cities and suburbs. At the bottom end of that estimate, if a commuter drives to work 20 days a month, current parking policy offers a subsidy of $5 a day — which is more than the gas and wear-and-tear costs of many round-trip commutes. In essence, the parking subsidy outweighs many of the other costs of driving, including the gasoline tax. "
https://www.nytimes.com/2010/08/15/business/economy/15view.html?_r=1oldId.20100816202602667
Biking in Baltimore