Rule: The headlight should be on low beam if there is on-coming traffic.
Traffic Logic: Headlights on high beam blind drivers in on-coming traffic(towards you). They would not be able to see pedestrians or obstructions on the road in the glare. This is a safety hazard. Put the beam on low, at least until the other vehicles are completely past. Avoid using high beam except on highways without streetlights. Traffic police should challan drivers using high beam within city limits.
Courtesy: Clicking the headlight off and on is a request to the on-coming driver to put the headlight on low beam.
Please learn to avoid driving high beam on city roads. Its a real menace for other drivers. This is the general practice in our country. Please make more people aware
of the difference between the high beam and low beam headlights. Dealers should mention this to their customers while making a sale.