He had his Persian provincial governors each build the section of the road within their province.
The satrapies were linked by a 2,500-kilometer highway, the most impressive stretch being the Royal Road, built by command of Darius I. Royal inspectors, the "eyes and ears of the king", toured the empire and reported on local conditions.
the Royal Road
The Royal Road was built by Darius to unite the sparse kingdoms he had conquered. The road was about 20ft. wide and stretched around 15,000 miles connecting North Africa and India and everything in between. There was an inn every few miles in which travelers could exchange their tired horses for fresh rested ones. There were also guards along the road making it the safest way to get across Persia.
It is not known how long it took for Darius the Great to have the Royal Road rebuilt. Considering that it was 2699 km (1667 miles) long and that it was of such good quality that it was still used by the Romans, this project must have taken years.
no
darius I darius I
The Royal Road or Achmaenid Road with its system of way stations and riders aided communication in Darius' empire. The road connected Susa with Persepolis and India.https://www.thoughtco.com/royal-road-of-the-achaemenids-172590
2500 km or 1600 miles
Satraps had to use it for Darius's control
He built the Royal Roads
The satrapies were linked by a 2,500-kilometer highway, the most impressive stretch being the Royal Road, built by command of Darius I. Royal inspectors, the "eyes and ears of the king", toured the empire and reported on local conditions.
the Royal Road
The Royal Road was built by Darius to unite the sparse kingdoms he had conquered. The road was about 20ft. wide and stretched around 15,000 miles connecting North Africa and India and everything in between. There was an inn every few miles in which travelers could exchange their tired horses for fresh rested ones. There were also guards along the road making it the safest way to get across Persia.
Darius I
It is not known how long it took for Darius the Great to have the Royal Road rebuilt. Considering that it was 2699 km (1667 miles) long and that it was of such good quality that it was still used by the Romans, this project must have taken years.
In the fifth century BCE, the Persian king Darius I built the Royal Road to connect his massive empire.
King Darius I created the Royal Road and reorganized the Persian Empire into satrapies ruled by a satrap.