Road speed limits in the Republic of Ireland apply on all public roads in the country. These are signposted and legislated for in kilometres per hour. Speed limits are demarcated by regulatory road signs (see Road signs in the Republic of Ireland). These consist of white circular signs with a red outline. Speed limits are marked in black with "km/h" below the speed limit. Smaller "repeater" speed limit signs are used along stretches of road where there is no change in speed limit, in order to remind motorists currently on the road and to inform traffic merging from junctions that a certain speed limit applies.
Speed limits in Ireland were introduced in 1876 by regulations made under the Dublin Traffic Act 1875 which prescribed speed limits of for certain vehicles. The Light Locomotives on Highways (Ireland) Order 1896 then set a maximum national speed limit of with a speed limit of for traffic in villages, towns and the Dublin Metropolitan Police District. Vehicles weighing more than 2 tons (unladen) were restricted to in these areas. This situation was updated in 1933 with Road Traffic Act 1933 prescribing an ordinary speed limit of 25 mph (40 km/h) for light motor vehicles or heavy motor vehicles fitted with pneumatic tyres. Lower speed limits were applied for heavy motor vehicles without some pneumatic tyres, or used for pulling another vehicle. Road signage was established by the Traffic Signs...... Read More