Reference · road & bridge standards

Special speed limit orders

How a local speed limit is set or changed on an Irish road.

Speed limits on public roads are set as default (national) limits or altered by special speed limit by-laws made by the local authority. A reduction in a posted limit is a record that a road's safe operating speed is lower than the default — but a limit reduction alone does not address a physical hazard on the road.

Source: Road Traffic Act 2004, Part 2; local authority special speed limit by-laws. Stated for reference.

A reference page explaining a published road or bridge standard. It states the standard only; it makes no claim about any particular location.

Last updated 2026-08-05. This is a living record — findings are added as dated entries and prior versions remain visible.