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Speed Limit Sign

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A416 Kingshill Way, Berkhamsted.jpg
Speed limit signs on the A416
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Speed limits in both the UK and the Republic of Ireland are indicated by red-bordered circular signs displaying a number in black text on a white background.

In the UK, speeds are expressed in miles per hour, with the limits on the public highway ranging from 20 mph to 70 mph, in multiples of 10 mph: the only ones allowed by law.

Signs on private land are not subject to regulation and speed limit signs of all kinds can be seen, as well as DfT-style signs with limits sometimes set as low as 2 mph.

In the Republic of Ireland the limits are in kilometres per hour, with the same basic style being used as the UK, but with a different, thinner, font for the numerals and the addition of km/h under the number.

Speed limits

There are a variety of speed limits in use and so each sign will be dealt with individually:




Speed Limit Sign
Traffic Signs
TypesInformation (UK TSRGD) • (IRL TSM) • Regulatory (UK TSRGD) • (IRL TSM) • Warning (UK TSRGD) • (IRL TSM)
UKAnderson report • Worboys report • Traffic Sign Design • TSRGD and TSM (Motorway alphabet • Transport alphabet) • Guildford Rules
IrelandTraffic Signs Manual
MiscellaneousList of Street Furniture Manufacturers
Regulatory Signs
Prohibitive OrdersGive Priority • Give Way • Maximum Height • Maximum Length • Maximum Weight • Maximum Width • No Buses • No Cycling • No Entry • No Explosives • No Motor Vehicles • No Overtaking • No Towed Caravans • No Turn • No Vehicles • School Crossing • Speed Limits • Stop • Stop / Go • No Stopping (Clearway) • No Waiting • Parking Restrictions • Red Route
Positive OrdersAhead Only • Keep Left / Right • Mini Roundabout • Minimum Speed • One Way Traffic • Turn Ahead • Bus Lane signs • Cycle Lane/Path signs • Tram Signs
OtherNO sign • Flood Gates • Snow Gates
Speed Limit Signs
20mph • 30mph • 40mph • 50mph • 60mph • 70mph • National Speed Limit (NSL) • Other Limits


30kmh • 50kmh • 60kmh • 80kmh • 100kmh • 120kmh


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