FlexiTrains may be made up of combinations of vehicles.

An informal suburban application over short distances may consist of only a few small vehicles, which all contribute power to the train. The benefit here is limited to the smaller road footprint, better traffic throughput, slight energy savings due to improved aerodynamics, and hands-off driving.

For longer commutes, the small trains and further individual vehicles would collect at designated staging areas and form longer trains, headed by larger commercially operated engines. The train would operate in accordance with pre-programmed acceleration parameters to make the best use of combined input from all vehicles for peak power demands. A "Trip Profile" would be generated for each journey to plan energy flows between the engine and the rest of the train. Typically, the whole train will be called on to help accelerate from rest or up steep gradients. The engine would then tow the train for the middle sector while charging the vehicles with surplus power. Regenerative braking would be used to recapture and store energy at a manageable rate. The commitment from the engine operator would be that no vehicle would leave the train with less charge in it's batteries than at the start of the journey. This "Free Energy Ride" capability would allow most urban trips to be made without requiring mains recharging away from home. This has further benefit in reducing infrastructure costs.