&gt; What mechanism of paying for roads would you propose?<p>There are two purposes of the gas tax:  (1) To pay for roads and (2) to provide incentives to conserve a valuable, limited resource (gas).<p>If we switch over to electric cars, taxing electricity makes sense from the standpoint of (2) because it&#x27;s the valuable, limited resource that&#x27;s being consumed by driving.<p>From the standpoint of (1), literally any source of government revenue will do.  You can tax electricity.  Or you can tax property (a lot of land&#x27;s value, especially commercial &#x2F; industrial, goes away if it isn&#x27;t connected to a good road system).  Or you can just use the general fund (basically everybody benefits from the enormous cross-industry economic gains of having functioning transportation infrastructure, so everybody should pay for it).