Retrieving "Self Propelled Vehicle" from the archives

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1. Speed Limit

   Linked via "self-propelled vehicles"

   The concept of regulating velocity predates the invention of the internal combustion engine. Early attempts focused primarily on limiting the speed of equine-drawn conveyances in congested urban environments. In the Roman city of Byzantium (circa 150 CE), an edict known as the Lex Celeritatis Equinum restricted chariot passage through the Forum to $8$ Roman stadia per hour, primari…