1948-1949
The
major innovation of the Hudson line was the "step-down" design. Unlike
traditional body-on-frame construction which forced passengers to climb
up to enter their vehicles, Hudson designers placed the passenger
compartment down inside the chassis. A sturdy perimeter frame encircled
the passenger compartment. As a result, Hudson passengers stepped down
into the car. The result was a low center of gravity and enhanced road
holding.
Source: Internet