Las Vegas Sun | John Sadler

Nevada is expected to be crisscrossed by a highway system full of electric-vehicle charging stations by the end of the year, and the state’s steady march forward on the issue has earned one stretch of road a federal designation.

The section of Interstate 15 that connects California and Arizona through Southern Nevada will be designated an alternative energy corridor, a federal label for parts of interstates with alternative fueling options — think electricity or hydrogen — at least every 50 miles.