What feedback can the vehicle give the user about its operating efficiency, and what instrumentation is needed to measure it? I think reliability should also factor in because failing parts have their own environmental cost.
Vehicle skin friction
Windscreen dirt sensor (Camera)
Vehicle Weight
Suspension load cell (Load Cell)
Rolling Resistance
Tyre Pressure (Wireless TPMS)
Drivetrain losses (Travel vs theoretical)
Wheel alignment sensor (ultrasonic? Accelerometer?)
Bearing/CV issues audible sensor (microphone)
Wind speed and direction (ultrasonic array)
Fleet reliability
MTBF data correlated (Fleet data connection)
Driving styles
Cornering speeds (Accelerometer)
Throttle position (Digital)
Cabin vibration/impulse (Acclerometer)
Ambient Temperature (shielded rtd)
Max/min battery levels (Digital)
Parked in Sun/Shelter (PV Cell)
Tyre degradation / tread depth (laser, ultrasonic, accelerometer inferred)
Brake degradation (digitally inferred, ?)
Auxiliary energy use
Entertainment system (Digital)
Climate controls (Digital)
Other (Digital)
Boeing was very good at Human Factors, you could find everything by feel, and a Dark Cockpit with no indicator lights if everything was normal. Even there, we had 2 pilots, and one was outside whenever the other was inside. We had Autopilot and in cruise we had time to play with navigation reroute programming and such. At low altitude when busy, there was very little inside time required unless in the clouds. I much prefer tactile knobs to a touchscreen where you have to look to find something. At the very least, have major functions in large icon boxes along the edge in consistent locations so easy to find and activate.
Much as I hate voice search, Voice Commands may suffice for some functions like Wipers On, Temperature warmer 2 degrees, Cruise Control to speed limit, and such, rather than looking inside for a couple seconds, (and half a football field) in order to do these functions on the touchscreen.