Now, more details of how that gargantuan task will be accomplished have emerged.
The program – which also encompasses hydrogen fuel-cell vehicles – will involve a mix of charging and refueling station construction, expansion of incentives, and regulatory changes to encourage the sale of more zero-emission vehicles, Automotive News reports.
The states will fund construction of more electric-car charging stations and hydrogen refueling stations, although so far only California has set money aside for the latter.
In addition, the coalition plans to streamline building codes and liability-insurance regulations to make it easier for new buildings to incorporate charging stations.
The plan also calls for uniform signage to indicate charging and refueling stations, as well as a uniform payment system for public charging stations.
This could make drivers' lives easier by eliminating the need to carry multiple cards and fobs for different charging station networks.
Finally, the states declared their continued commitment to monetary incentives--such as tax credits and purchase rebates--and non-monetary ones like single-occupant carpool-lane access and preferential parking for zero-emission vehicles.
Nearly all of these measures were discussed at preliminary talks late last year, but now it appears the states have committed to them.
They're known as the 'Clean Car States,' because they all followed California's lead in adopting stricter emissions standards.
Their cumulative goal of 3.3 million zero-emission vehicles on their roads by 2025 represents a new effort toward emissions reduction; the eight states currently account for about one-quarter of total US new-car sales.