Double-decker bus tilt test in 1933, London.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...t_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h..._tilt_test.jpg
Previously:
https://www.homemadetools.net/forum/...056#post125563
https://www.homemadetools.net/forum/...224#post126496