Traffic circular; Supplement to Traffic Circular No: 6, issued 12th February 1980.

• Physical description

  Dimensions

  Attribute	Value
  Height	244Mm
  Width	186Mm

  Colour

  Attribute	Value
  Colour	Yellow

  Item content

  Attribute	Value
  Text	Automatic Control of Signalling. Holborn & Aldwych.

• People involved

  Role	Person(s) involved
  Printer	Waterlow (London) Ltd. 76080.,
  Publisher	, 1980

• Associated companies, people and places

  Company

  Attribute	Value
  Line	Piccadilly Line., February 1980.