Scott en Aztlán wrote:

> A gasoline tax increase would punish people for driving on empty roads
> and do nothing to relive congestion on crowded ones.

Depends on how high it is. People typically get better mileage on empty
roads and will go further on the same tank of gas as compared to those
stuck in perpretual traffic jams.

In my car, I get around 25 to 26 mpg on empty roads (which I drive quite
often). If I were to drive in conjested stop and go traffic, I get
around 18 mpg.