“I have long been struck,” he writes, “by the ingenuity and thoroughness with which wheeled traffic was excluded” from cities such as Rome and Pompeii.
“The entire system of mainly one-way streets, blocked streets, closed streets ... show that traffic flow was not unrestricted,”
These carriages, driven poorly, could also be deadly, another reason for restricting their passage.
https://www.forbes.com/sites/carltonreid/2024/08/28/how-ancient-rome-restricted-wheeled-traffic-and-why-cargobikes-are-best-for-todays-cities/