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That explains the Tesla "truck"

The road from Rome to Capua is 119.3 miles (192 km) and was constructed from 312 BC to 308 BC. It cost 259 million sestertii (about 65 million denari), which adjusted for inflation would be the equivalent of about 10.90 USD per sestertii. The total cost of the road would thus be 2.81 billion USD, or a per mile cost of 23.7 million USD/mi.

Modern interstate highway construction comparatively ranges from 7 to 11 million USD/mi, while state highways run between 1.3 and 6.8 million USD/mi.

The best known records place the annual budget of the Empire at about 20 billion sestertii so the road cost about 1-2% of the Empire's budget. With 248548.5 miles of roads constructed, the total cost of their construction is 5.8 quadrillion USD.

The US has 4.09 million miles of roadway, with 47432 miles of interstate and 175514 miles non-interstate highway. So the total cost of construction for US roads is around
6.8 quadrillion USD.

So we could build everything like the Romans, but you get 16 times less of it.

Lol. Trufe