As a newcomer to the EV world, there are so many things I am looking forward to discovering. During my 50+ year experience with ICE's, I have always been interested in the relationship between highway cruising speed, gearing, and fuel consumption. I am now starting to focus on the availability and location of charging stations, and am wondering if, in the absence of a transmission and differential, there is an optimal cruising speed in an EV. Or, is there simply a straight line ratio of speed to energy consumption. Any thoughts?