I used to drive '86 Volvo F10. First Volvo cabover with long leafwprings, and I'd say it rund not so smooth. Rought like old FLA. But Volvo cab is silent.
I have a 1984 scania 142 and that has 2 point cab suspension, compared to a 4 point suspended cab it's quite rough on bad roads also there is alot more vibration in comparison, I don't think anyone would buy a truck here with 2 point cab suspension
fire truck for tunnels where tunnel is too narrow for turning vehicle truck can be driven in other direction it have front axles .....