Category Archives: Useful Information

Why Do Some Traffic Signals Flash Red and Some Flash Yellow Amber in India?

Ever wondered, why do some traffic signals always flash red and others flash yellow/amber, especially at night? What do these flashing signals with different color codes mean? Do these blinking signals have any meaning?

If you have every stood at a cross road when the signals were working (but in standby mode on a continuous blink), like when a VIP was passing by or late at night when there is less traffic on the road, you may have seen that some traffic signals flash red and others flash yellow/amber.

They are specifically set to flash a specific color based on the type of road and based on the purpose of having the signal.

You will notice at a cross road, that the Arterial Road or Main Road or Highway will always have the Amber Light Flashing. A smaller road or a lane will have a Red Light Flashing. This is designed to allow the Arterial Road or Highway Traffic to have priority over the smaller road or the less priority road. A VIP Route or larger width road will always have traffic priority over a smaller road or lane.

What does a traffic signal blinking red indicate?

A red blinking signal indicates that the motorist must come to a complete stop and then proceed. They must yield or give way to the traffic coming from the other intersecting road.

What does a traffic signal blinking yellow/amber indicate?

A yellow blinking signal indicates that the motorist must come slow down and then proceed after checking if the road is clear. They get priority over the traffic coming from the other intersecting road.

The Difference Between Railway Protection Force (RPF) and Government Railway Police (GRP) in India

What is the RPF?

The RPF or Railway Protection Force is a statutory body which is set up under the The Railway Protection Force Act, 1957 with the primary responsibility of protecting the property of the Indian Railways.

As per the Railway Protection Force Act, 1957:
(e) “railway property” includes any goods, money or valuable security, or animal, belonging to, or in the charge or possession of, a railway administration;

What is GRP?

What is the difference between RPF and GRP?

Who are the uniformed Army, Navy, Air Force Personnel standing behind the President of India or Governor? Aide-de-Camp

You would often have seen uniformed Army, Navy or Air Force Personnel standing behind the President of India or Governor of any State in India. Who are these people and what is their role? Are they bodyguards?

They are known as Aide-de-camp or ADC.

Multiple ADCs to the President of India, Smt. Pratibha Devisingh Patil, at Rashtrapati Bhavan, on 24-4-12

Who is an ADC or Aide-de-camp?

An ADC or Aide-de-camp is an Attendant, Assistant or Secretary of the President / Governor appointed from the Armed Forces or the Indian Police Service or even the Indian Administrative Service. The ADC historically was like a “wing-man” who would assist the king or ruler with mounting / dismounting from his horse and also attending to secretarial or administrative activities.

Though India has had a female President, there has never been a female ADC appointed yet.

Are ADCs different from the President’s Body Guards?

Yes. Aides-De-Camp wear a distinct uniform with a braided cord on the right shoulder, whereas President’s bodyguards are usually horse mounted and are more for show and pomp.

President’s Body Guards are different from an ADC

What is the role of an ADC?

Who appoints the ADC for the President of India or Governor of a State?

As per the Indian Naval Auxiliary Service Regulations, 1973:

Honorary Aide-de-Camp:

(i) Officers of the Service are eligible for appointment as Honorary Aide-de-
Camp to the President of the Republic of India. Not more than one
officer, at a time, should hold such an appointment which shall be for a
period of five years but may be terminated earlier on the holders demise,
demotion, discharge or retirement from the Service or demission of office
by the President.

(ii) An officer shall be granted a step higher in honorary rank or any
substantive rank held by him on appointment as Aide-de-Camp to the

(iii) The rank of an Officer for appointment as Aide-de-Camp to the President
shall be Commander.