Author(s)

N.G. Harris

Abstract

The planning of railway extensions is a complicated affair, especially when they are added to a large existing rail system. Although standard network modelling procedures have been available for a number of years, these are not always sufficient to provide a solid appraisal which will satisfy the funding and political pressures inherent in a modern democracy. This paper describes the computerised processes used during the planning of the proposed extension of London Underground's Piccadilly line to Heathrow airport. Both network modelling and train service simulation have been used as integral parts of the planning process. The aim has been to produce the optimum extension, despite limited funding and a number of complicating issues including both inter-modal and on-rail c

Keywords