The Board of Transport
Commissioners for Canada
Commission des Transports
du Canada

Order no. G.O. 753

Tuesday, the 8th of
May, A.D. 1951

In the matter of Regulations respecting devices for the sounding of Engine Whistle Signals and with regard to Engine Bells.


M. B. Archibald
Chief Commissioner

Hugh Wardrope
Assistant Chief Commissioner

Armand Sylvestre
Deputy Chief Commissioner

F. M. MacPherson

H. B. Chase

W. J. Patterson

It is ordered that the regulations hereinafter set out under the heading, Regulations in regard to devices for the sounding of Engine Whistle Signals and in regard to Engine Bells, be, and they are hereby, made and adopted in respect to motive power units capable of independent operation excepting steam locomotives.

In these regulations—

  1. The words Motive Power 'A' and 'B' units or Motive Power unit, do not include steam locomotives.
  2. The word whistle includes a horn.

Regulations in Regard to Devices for the Sounding of Engine Whistle Signals and in Regard to Engine Bells.

    Road Service Units

  1. Within one year of the date of this Order motive power A units operated regularly or temporarily in road service, including road-switching units, shall be equipped with horns having tonal characteristics simulating the sound of conventional steam locomotive whistles. The horns must be tuned in chords of not less than three tones to produce a harmonious sound, and the grouping and location of the horns shall be such as to make the sound practically omnidirectional and suitable for the effective sounding of the prescribed Engine Whistle Signals.
  2. Each motive power B unit shall be equipped with a suitable warning device for use when making hostling or similar movements.
  3. Yard Service Units

  4. Motive power units assigned to yard service shall be equipped with a horn of such type as will meet the requirements of the individual railway companies.
  5. Approval

  6. Specifications of the horns to be used on Road and Yard Service Motive Power Units to be submitted to the Board for approval (See Chap. 70, 11 Geo. VI—An Act to amend the Railway Act—assented to 17th July, 1947: Section two of the Railway Act, chapter one hundred and seventy of the Revised Statutes of Canada, 1927, is amended by inserting immediately after paragraph thirty-five thereof, the following paragraph: (35a) 'whistle' includes a horn of any type approved by the Board.)

    Engine Bells

  7. Each motive power unit capable of independent operation other than B units must be equipped and maintained with a bell of at least 30 pounds weight.
  8. General

  9. This Order shall apply to all railway companies subject to the jurisdiction of the Board except railway companies which the Board by Order exempts from the application of this Order.

M. B. Archibald
Chief Commissioner,
The Board of Transport Commissioners for Canada.