Very similar but there was an additional degree-of-freedom, the driver's steering (and braking), which can either improve or worsen the situation. Initially I t

Very similar but there was an additional degree-of-freedom, the driver's steering (and braking), which can either improve or worsen the situation. Initially I tried to countersteer to correct the oscillation, but I was too slow - the oscillation amplitude increased! Changing tactics to damping the oscillation by keeping the wheels as straight ahead as possible (and slowing) did the trick or I likely wouldn't be posting this!