Many roads were built at that time, along with inns, post offices and stables for the horses of travelers. The roads were used for trade and communication in a manner similar to the [[Persian Royal Road]] and the roads of the [[Roman empire]]. | Many roads were built at that time, along with inns, post offices and stables for the horses of travelers. The roads were used for trade and communication in a manner similar to the [[Persian Royal Road]] and the roads of the [[Roman empire]]. |