Between two cities of equal or lesser importance was the via sacra, reserved for the use of embassies, couriers, and officials. This has been associated with the system of passus outside the city walls, which allowed travellers to use a track that was prepared and guarded in advance, thereby saving the expense of making a paved road. During the Republican period, formal Roman roads were raised, widened and paved and many were lined with rows of wooden posts.
Some roads in Roman material culture became viae, viaire, and viae, used for transport of goods. This was mostly in areas with suitable natural harbours, such as in Britain. The earliest roads were relatively primitive, poor, and often horse-drawn. But as the Romans learnt how to develop Roman roads, they created viae viae with more solid roadbeds, and pavements. Take, for example, the Roman Via Appia which connected Rome and Capua. It incorporated the older Via Latina, across which the Roman road ran where the two streets adjoined at Rome, and the Via Ostiensis, a secondary road that connected Ostia with Rome.