I was going to devote my second article on Sydney Metro West to the implications of Labor’s promise to scrap the Sydenham to Bankstown section of the Sydney Metro City and South West (Metro CSW). However, the question of station spacing along the Metro West corridor has been raised in responses to my last post, in particular the large distance between stations on certain segments of the line. This raises some interesting issues around station location planning, so I’ll defer my review of Labor’s policy and look at these first.
Background
Metros, subways, call them what you will, were first constructed in 19th and early 20th century inner cities in Europe and America to connect key destinations such as railway termini and to provide a congestion-free alternative to road transport. Consequently, the first metro stations were usually very closely spaced, often only two or three hundred metres apart.
Over time dense networks of lines and stations were developed in many of these centres. While this provided a very efficient and effective form of transport there were some downsides as both cities and networks expanded. Many systems experienced overcrowding and with such closely-spaced stations average speeds dropped considerably on longer journeys as lines were extended.
Later metro systems started to be constructed with wider-spaced stations, partly in response to these issues. Maximum walk-up catchment for a metro or other rapid transit stop came to be generally regarded as around 800 metres (this is a gross simplification of this issue – see these articles by Jarrett Walker, Alon Levy and Alan Davies for further discussion).
Suburban railways have always tended to have more widely spaced stops, though initially development was also confined to walkable distances from these stations. Transport planners also have to juggle many other factors which influence station location. These include geographic and geological constraints, the location of key centres, catchment population numbers and densities and, increasingly, the presence of other infrastructure such as older rail and motorway tunnels. Continue reading




