This article is a preface to the translation by Braess, Nagurney, and Wakolbinger of the 1968 paper by Braess, "ii¾ber ein Paradoxon aus der Verkehrsplanung" (Unternehmensforschung12 258-268).
['Anna Nagurney', 'David Boyce']
Preface to On a Paradox of Traffic Planning