Smeed argued in his seminal paper on the space needs of urban traffic1 that the transport infrastructure required space and that urban space was limited. He built a highly theoretical, abstracted model to investigate what the space budget might be. Smeed began with the table of indicative capacities (see Figure 9.1).
Figure 9.1 Indicative modal capacities (persons per hour)
Source: Adapted from Smeed (1962), table 1, p. 137.
Figure 9.1 is a child of its time. The road ‘capacities’ are related to those produced by the Road Research Laboratory (of which Smeed was Director) and shown in Figure 7.6. In demonstrating ...
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