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 eased by the adoption of viaduct crossings. Such a system would lead to an automatic distribution of traffic which would go far to reduce the troubles of congestion. (Fig. 4.)



My special object in mentioning this subject here is that Manchester offers a conspicuously successful example of the bifurcation principle. Nearly all its main roads of ingress have relief roads parallel to them.

I have had no special opportunities of making a historical study of Manchester's growth so that I am unable to tell you, what very likely my audience can tell me, how this has come about. It is quite clear, however, that Manchester