fair point that I didn’t consider! my assumption would be traffic, seeing as the toll is branded as “congestion pricing” - which wouldn’t really make sense for motorcycles because they make up so little of the actual cause of traffic in NYC (large motor vehicles).
If we’re talking about noise though, and how clean the engine burns fuel, motorcycles are 100% guilty as charged IMO.
Deaths and injuries is a little muddier because there are several factors at play, fault could lie on any individual involved in the accident, or maybe even the road design itself. I don’t think these would be robust enough to use as the sole basis for a toll fee