An interesting perspective from The Atlantic.
In Miami, New York, Philadelphia, Pittsburgh, Seattle, and Tampa, one-hour car-sharing reservations are taxed at more than twice the local sales tax rate. One-hour trips are among the most economically inefficient, since you may wind up paying the same one-time transaction fee that you would on an entire week’s car rental. In New Jersey, that’s a $5 fee every time you take out a car. Pennsylvania charges a $2 “security fee” for each reservation. Colorado, Connecticut, Florida, and New Mexico each have $2 per-transaction surcharges as well.