We're all familiar with driver's licenses - and annual car checkups, traffic laws and the plethora of other bureaucratic intricacies surrounding personal travel.
But, we shouldn't forget that for the vast majority of human history we moved from point A to point B on horseback.
Now, of course, such mundane regulations aren't well represented in the historical record.
Usually, the most we can attest to is horse-based transport, usually carts and wagons, being banned from entering particular streets or neighborhoods in cities.
That's what our magnanimous friend, Julius Caesar, had promulgated in the city of Rome.
During the first 10 hours of daylight each day, horse-drawn traffic wasn't allowed in - with the only exceptions being for vehicles carrying human sacrifices to the Roman Pagan Gods, those supplying the military (of course) and those intended for sanitation.
Similar regulations have been found in other Roman cities, like Ostia and Pompei, But they too were only concerned with where horses could tread, rather than who could use them.
Even after the Roman Empire fell, things mostly stayed the same - many cities in Medieval Europe inherited the Roman legal system, including the odd horse-traffic laws.
There was some innovation: for example, in the 15th century our dear London instituted what may very well be one of the first speed limits ever - By restricting the speed of unloaded carts to that of loaded ones, under pain of paying forty pence (and maybe even prison).
It is roughly around this time period that we also see the emergence of criminal laws specifically penalizing improper horse-drawn conduct - as can be seen in this not-quite-photorealistic illustration.
