The development of small reliable electric drive motors built onto drive shafts (and now built into wheel hubs) a la Tesla motors, reduces the need for any turbine to be used on the road.
This new one is built into the wheel hub, 31kg for the wheel, which delivers 100HP and 1000Nm and acts as a regenerative brake.
Protean Electric
This company first showcased an eclass mercedes with this technology a few weeks ago.
Battery could be charged from the turbine in flight.
Mickjoebill