If more and more electric vehicles are purchased, it is obvious less gas powered cars will be driven.
If there are less gas cars on the road, obviously, there will be less road taxes collected.
It is obvious that state and federal govs will be in search of more revenues, especially for road maintanence and construction, especially as one must consider all the additional weight of the batteries.
I really hope someone has considered all this, and the load on the powergrids. Though my hopes are that they are prepareing, my experience tells me that they have no such plans, yet. That just might mean we will all need to drive around carrying generators while avoiding too much load on bridges.