Actually, it's the cost of the infrastructure. But you're right. If you compare that, for instance, to rail, putting those wires in would not be that prohibitive.
It could be one solution, for instance, to have electric vehicles on a dedicated lane. We're seeing more and more that even if the trolley solution would be one solution, then you would have to have a bit of autonomy so you don't have the same constraints you have with a rail vehicle that really has to stay on those tracks, otherwise everything is stopped.
It's probably a mix of trolley with some off-grid capacity. That's possibly one solution, from our perspective.