"I-95 is the highway and the speed limit on it." Hunh? Not on the parts I've been on. I don't know if we ever got over about 50 mph. Traffic -- way too much of it.
And then, for the folks with US speedometers, most likely the speedo in the car/truck is marked in both miles and kilos/hour. Sit down in the seat, look for the 200 k -- and right next to it will be the mph equivalent. No math required.