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Fire: Not technology. The methods of producing it: technology. I don't even think that furnaces existed 2000 years ago, much less any of the common methods we use to fire furnaces in the 21st century.


The Ancient Engineers

I highly recommend reading this book. It's amazing how far back some of the technology goes. There was a developer from around 2,000 years back that converted houses to central heat for profit.

Quote:
Improved road surfaces: I don't know. Did asphalt and concrete exist 2000 years ago? Reflective paint definitely didn't.


The Colosseum is made of concrete and nearly 2,000 years old. Most of ancient Rome was made of concrete. Many of the roads built by the Romans are still in use. The book linked above has the specs they used.