The Gupta Empire built roads to improve and help the trade ways become easier to move/travel on. With importing and exporting and there were signs on the road so people knew where they were and where they were going.
-ISN page 80

The roads connected India to China. Which also helped trade get from place to place fast and simple. From the middle of the country to another country without having to go over seas.
-ISN page 80

This scenario is similar to the Gupta Empire