As part of the FAST (Fixing America’s Surface Transportation) Act of 2016, states were invited to designate Alternative Fuel Corridors, one type of which were EV Charging Corridors (primarily DC Fast charging along highways). Here are the resulting corridors in the mid-Atlantic:
Not surprisingly, the corridors follow most interstate highways. The solid green lines are “signage-ready” meaning a useful amount of charging already exists. Note, this is largely independent of the Tesla Supercharger Network. The dashed orange lines are terranova, in that they need basic charging infrastructure, and are thus referred to as “signage-pending”.