Did you know, street lights hold a secret… Street lights mean 30mph, unless otherwise stated. If you don’t know the speed limit in the area you are driving and there are street lights, just remember the speed of the lights. Knowledge is life. Drive smart, arrive safe.
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If you are unsure of the speed limit on a particular road where it is built up and there are street lights, assume that the speed limit is 30mph. If the speed limit is above 30mph there will be repeater speed limit signs placed in regular intervals.
The law does not allow Highways Authorities to place repeater speed limit signs in a 30mph area where there is a system of street lighting, lit or unlit.
| Vehicle | Built-up area (Street Lit)* | Single Carriageway | Dual Carriageway | Motorway |
|---|---|---|---|---|
 |  | 60 MPH | 70 MPH | 70 MPH |
 | | 50 MPH | 60 MPH | 60 MPH |
 | | 50 MPH | 60 MPH | 70 MPH ++ |
 | | 50 MPH | 60 MPH ++ | 70 MPH ++ + |
 | | 50 MPH | 50 MPH | 60 MPH |
