What is 'off-tracking' or swept path (barrido de curva / radio de giro interior) of a long articulated vehicle in tight curves and city intersections?

1. The trailer wheels follow a track wider and further to the outside of the curve than the front wheels
2. The rear trailer wheels follow a tighter path closer to the inside of the curve than the steering wheels, requiring the driver to swing wide to avoid clipping curbs, poles, or pedestrians
3. The vehicle jumps over the curb automatically
4. The truck floats on its suspension without turning