Exactly. A transportation infrastructure operates most economically when its capacity is (close to) maxed out. Since demand is variable it will inevitably hap

Exactly. A transportation infrastructure operates most economically when its capacity is (close to) maxed out. Since demand is variable it will inevitably happen that the capacity is sometimes not enough (as in overbooked flights). Traffic jams are the result. So what this system is doing is moving traffic jams underground or, as you say, to the on-ramps. What have we gained?