Bet they didn’t have 6000 sesterces toilet seats...
:^) The Roman army built the road system, canals, bridges, had at least a hand in aqueduct construction, some frontier barriers (Britain, Germany etc, the Middle East, I think N Africa...), and at least five large naval bases. And they were good at it, and fast, and cost effective.
They kept local order, guarded frontiers, basically eliminated piracy, and supplied a stream of retired soldiers who settled throughout the Empire.