Where:
On any road, before an intersection controlled by traffic lights, particularly in areas where traffic lights are new, isolated, or at pedestrian crossings.
This sign is placed in advance to alert drivers to the presence of the traffic signals so they can adjust their driving in time.

Purpose:
To warn drivers that traffic lights are ahead, which may be isolated or recently installed.
The sign helps prevent accidents by giving drivers time to prepare for potential stops, changes in traffic flow, or pedestrians crossing.
It is especially important at intersections where other drivers or pedestrians might not follow the signals properly.

Action:
Reduce your speed immediately as you approach the traffic lights.
Be prepared to stop if the signal changes from green to amber.
Observe the lights closely and ensure that you follow them correctly.
Watch for pedestrians who may cross unexpectedly, especially at crossings near isolated or new traffic signals.
Check for cross-traffic that may not fully obey the signals.
Proceed cautiously even if the light is green, being ready to stop if a hazard appears.