A transportation system was established for quickly and smoothly transferring information between the central and local governments, and based on the transportation system, a road system was developed.
中央と地方の情報伝達を迅速・円滑に行うために駅伝制が実施され、この駅伝制の下で、中央と国内各地を結ぶ道路網が整備されていた。