A well-defined yellow painted cross on heavy machinery tyres warns operators who wrongly stand close to the mean on wheels rotation wise.
Aforementioned simple and pragmatic solution, even taking into account high steerability of some vehicles as well as lack of visibility while maneuvering, joins reverse acoustic-flashing alarm.
Marking a tyre costs nothing and spares an injury, a cross saves your life!
See attached picture.
Domenico Franciosi
(On/Off-Shore Materials, Logistics & Transportation Professional & Consultant)