9 . All 50 states received final approval Tuesday to begin construction on a first nationwide network of EV charging stations (电车充电站) that places one roughly every 50 miles (80 kilometers) along interstate highways, part of the Biden administration’s plan to encourage widespread use of zero-emission cars.

The Transportation Department said it had OK’d EV charger plans from a last set of 17 states, causing the release of $1. 5 billion in federal funds to all jurisdictions (权限) nationwide — or $5 billion over five years — to build or upgrade chargers along 75, 000 miles (120, 000 kilometers) of highway from coast to coast, with a goal of 500, 000 EV chargers nationwide. Plans for the other 33 states and the District of Columbia were approved earlier this month.

By year’s end, drivers could start seeing expansions and upgrades to existing highway EV stations in states such as California, Colorado, Florida and Pennsylvania that now have at least four fast-charger ports, enabling EVs to fully recharge in about an hour.

“America led the original car revolution in the last century, and . . . we’re prepared to lead in the 21st century with electric vehicles,” said Transportation Secretary Pete Buttigieg. He said the plans will “help ensure that Americans in every part of the country can be positioned to unlock the savings and benefits of electric vehicles.”

The approval is a major step toward building widespread acceptance and use of electric vehicles among consumers, who most often express unwillingness over EVs’ shorter range and limited use of public chargers. President Joe Biden has set a goal that 50% of new U. S. car sales be electric by 2030, and his administration touts (推销) new tax credits next year of up to $7, 500 as making electric vehicles accessible for everyday Americans. Still, the five-year plans suggest a potentially long and rough road ahead for a highway EV network, with states saying risks such as a lack of electricity grid capacity (电网容量), supply chain shortages and equal rights concerns.