Editing Roman roads (section)

===Engineering works===
Romans preferred to engineer solutions to obstacles rather than circumvent them. [[Outcrop|Outcrops]] of stone, ravines, or hilly or mountainous terrain called for [[Cut and fill|cuts]] and tunnels. An example of this is found on the Roman road from [[Căzănești]] near the [[Iron Gates]]. This road was half carved into the rock, about 5{{nbsp}}ft to 5{{nbsp}}ft 9{{nbsp}}in (1.5 to 1.75{{nbsp}}m); the rest of the road, above the [[Danube]], was made from wooden structure, projecting out of the cliff. The road functioned as a towpath, making the Danube navigable. [[Tabula Traiana]] memorial plaque in [[Serbia]] is all that remains of the now-submerged road.{{see also|List of Roman bridges}}
[[Roman bridge]]s were some of the first large and lasting bridges created.<ref>{{Cite web |title=De Ferranti - Glossary - Roman bridge |url=https://deferranti.com/index.php/glossary/view/gl179162#:~:text=Roman%20bridges,%20built%20by%20ancient,arch%20as%20its%20basic%20structure. |access-date=2022-09-23 |website=deferranti.com}}</ref> River crossings were achieved by bridges, or ''pontes''. Single slabs went over rills. A bridge could be of wood, stone, or both. Wooden bridges were constructed on [[Deep foundation|pilings]] sunk into the river, or on stone piers. Stone [[Arch bridge|arch bridges]] were used on larger or more permanent crossings. Most bridges also used concrete, which the Romans were the first to use for bridges. Roman bridges were so well constructed that many remain in use today.

[[Causeway]]s were built over marshy ground. The road was first marked out with pilings. Between them were sunk large quantities of stone so as to raise the causeway to more than {{convert|5|ft|abbr=off}} above the marsh. In the provinces, the Romans often did not bother with a stone causeway but used [[Corduroy road|log roads]] (''pontes longi'').