They are powered and synchronized to the correct speed to eliminate skidding when they are engaged. Large brake shoes for emergency braking squeeze the track on the same surfaces as the motorwheels and idler wheels. We are designing for an emergency braking rate of sixty meters per second per second. Electronic steering control using proximity sensors backed up by secondary mechanical steering control. Batteries help buffer computer and low-power electronics from noise and have enough energy to take the vehicles to a stop if there is a power failure in the guideway.
Redundant computers control the vehicles.
Damped suspension between motorwheels and skyhook interface have weight sensors and allow pods to swing out in curves or cross winds, but lock in vertical position when stopped. The back end has mating parts for pulling or being pushed. It will have rollers and belts for automatic loading and unloading. It will be the largest and heaviest of the pods, and a design driver for the guideway. As you can see from the drawings below it will have four sliding doors.