Well done, Mr. Policeman!

I was at a junction, waiting for the red signal to turn green. Right in front of me was an ambulance, its siren wailing to indicate the sense of urgency to get to a hospital. I could see the family inside the ambulance staring straight at the signal post, as if willing for the signal to turn green. But the signal continued to be red for the side the ambulance was in and the traffic from another wing of the junction, flowed, taking advantage of the green signal in their direction. I watched as the signal did not seem to change colours for a very long time. There was a policeman standing in the corner, watching this scene.
In a few seconds, he decided to take matters into his own hands. He stopped the side that had the green signal to move, motioned to the traffic on my side of the road, to start moving, signaling to cars and two wheelers to move on the left of the road so that the ambulance could pass through; all this while the signal still gleamed a bright red for this wing of the junction. Once the ambulance had passed the junction, he indicated to the riders from my side of the road to stop, and let the traffic signal control the flow of traffic again.
I have seen ambulances wailing away at signals till date, waiting for the signal to turn green so that the traffic in front of it would move and it could then move too. But never have I seen a policeman intervene to override the control of traffic by an automated signal, just to allow an ambulance to pass through, and then return the control back to the signal.
Well done, Mr. Policeman! God bless you!