[masklinn]

This doesn’t really give perspective, it’s basically what they’re saying. Roman bridges are gravity structures, the entire thing is in compression and heavy, the arches have really limited spans.

Compare to the Millau Viaduct for instance.

[otikik]

Well in order to compare things properly we would have to check if the Viaduct is still there 2000 years from now.

[masklinn]

That's a completely different axis is the point, you can not solve the issues the viaduc solved, let alone build anything even remotely similar, using roman materials (to say nothing of techniques).