Regulatory signs show the course a driver must follow and an action they are required to take – or forbidden to take.
They are generally circular and have a red border with black symbols or letters on a white background.
Mandatory regulatory signs that indicate the direction traffic must take at junctions are blue and white.
 Stop |
 Yield |
| Yield |
| School wardens stop sign |
| No left turn |
 No Entry |
| No right turn |
| Parking prohibited |
| Clearway |
| Max speed limit 30km/h |
| Max speed limit 50km/h |
| Max speed limit 60km/h |
| Max speed limit 80km/h |
| Max speed limit 100km/h |
| Max speed limit 120km/h |
| Taxi Rank |
| No entry for large vehicles(by reference to weight) |
| No U-turn |
| No overtaking |
| Height restriction |
 Pedestrianised street |
 Parking permitted |
 Disc parking plate |
 Zonal restriction – no parking of large vehicles |
| End of the restriction zone |
Mandatory signs at junctions (white and blue)
|
| Turn left ahead |
| Turn right ahead |
| Turn left |
| Turn right |
| Pass either side |
| Straight ahead |
| Keep right |
| Keep left |
Manual traffic control sign at roadworks
|
| No entry for pedestrians to tramway |
| Stop |
| Either form of Go |
| or Téigh can be used |
| No entry to goods vehicles (by reference to number of axles) |
 With flow bus lane on left |
 With flow bus lane on right |
 Contra flow bus lane |
| Tram lane on left |
| Tram lane on right |
 Start of cycle track |
 End of cycle track |
 Electronic variable speed limit sign (tunnel only) |
 In a tunnel goods vehicles cannot use right-hand lane (by reference to number of axles) |
 Electronic periodic speed limit sign |
 Electronic periodic speed limit sign at school |
 Tram only street |
 Tram and access only street |
| Bus only street |
Traffic lane control signs in a tunnel
|
 Go (Lane open) |
| Stop (Lane closed) |
| Move into the left-hand lane |
| Move into the right-hand lane |
Stop
Yield
Yield
School wardens stop sign
No left turn
No Entry
No right turn
Parking prohibited
Clearway
Max speed limit 30km/h
Max speed limit 50km/h
Max speed limit 60km/h
Max speed limit 80km/h
Max speed limit 100km/h
Max speed limit 120km/h
Taxi Rank
No entry for large vehicles(by reference to weight)
No U-turn
No overtaking
Height restriction
Pedestrianised street
Parking permitted
Disc parking plate
Zonal restriction – no parking of large vehicles
End of the restriction zone
Turn left ahead
Turn right ahead
Turn left
Turn right
Pass either side
Straight ahead
Keep right
Keep left
No entry for pedestrians to tramway
Stop
Either form of Go
or Téigh can be used
No entry to goods vehicles (by reference to number of axles)
With flow bus lane on left
With flow bus lane on right
Contra flow bus lane
Tram lane on left
Tram lane on right
Start of cycle track
End of cycle track
Electronic variable speed limit sign (tunnel only)
In a tunnel goods vehicles cannot use right-hand lane (by reference to number of axles)
Electronic periodic speed limit sign
Electronic periodic speed limit sign at school
Tram only street
Tram and access only street
Bus only street
Go (Lane open)
Stop (Lane closed)
Move into the left-hand lane
Move into the right-hand lane