raeda
This vehicle (its name points to Celtic origins), a four-wheeler with benches for seats and a removable canvas top which was drawn by a varying number of mules depending on weight, was used for longer journeys with heavy loads.
The practice of restricting wheeled vehicles in Rome during daylight hours was begun in the princIpate and continued into the Empire. The privilege of using a carriage during the day in crowded Rome was permitted to Vestal Virgins alone.