Collecting money via tolls has a higher administrative cost compared to collecting money via the gas tax [1]. The infrastucture to collect the gas tax is already in place. In contrast, there are a lot of things that need to be done before tolls can be put in place (legal, contracting, setting up collection points, etc). Plus, the public-private partnerships that some governments get into for these types of toll roads…
I wish it was that simple. Raising the gas tax isn't the solution. The gas tax will not work for to much longer because it doesn't accurately correlate to the number miles traveled. - A old compact car from 2007 may only get 20 mpg while a new car from 2017 may get 40 mpg. - Someone would a plug-in hybrid such as a Chevy Volt may only fill up their tank once every few months as they start off with a 50 mile battery r…
And making those adjustments would cost far less money compared to setting up additional tolls or a VMT based taxation scheme.