Don't bother.<p>Instead, allow for car-based mass transit, by allowing far cheaper taxi cab medallions and issuing as many as people will pay for.<p>WHY is the cost of a taxi cab medallion in NYC $750K?<p>Instead sell them for say $1200/year renewable yearly.  Allow pricing to fall or rise based on the market, provided they are within a range (e.g. no less than 50 cents and no more than $3 per unit of distance traveled).