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Impossible? by Julian Havil

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Chapter 4

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BRAESS’S PARADOX

People take different roads seeking fulfillment and happiness. Just because they’re not on your road doesn’t mean they’ve gotten lost.

H. Jackson Browne

A Road to Nowhere

In the 1969 publication ‘Graphentheoretische Methoden und ihre Anwendungen’, W. Knödel remarked that

. . . major road investment in Stuttgart’s city centre, in the vicinity of the Schlossplatz, failed to yield the benefits expected. They were only obtained when a cross street, the lower part of Königstrasse, was subsequently withdrawn from traffic use. . . .

Eliminating a road, rather than building a road, improved traffic flow.

Figure 4.1.

Figure ...

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