How did Roman technologies help in the expansion and governance of the empire?

Like the
previous teacher stated, Roman roads were important to save time on travel. But here are a few
other things that helped drastically.

1. Roman bridges. They are still in
use, like in Trier, Germany. Commuters still use it everyday. This is all the more important,
because when you read Caesar's commentary on the Gallic Wars, he makes this point repeatedly.
The Romans were able to tame rivers through their bridges, while their enemies could do nothing.
If you count the amount of words that he uses to describe bridge building, you would be
impressed.

2. Romans had amazing military weapons. Josephus, the Jewish
historian, who recounts the Jewish wars with Rome, writes about Roman military weapons, like the
catapult. The ability to hurl...