Braess's paradox
Paradox related to increasing roadway capacity / From Wikipedia, the free encyclopedia
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Braess's paradox is the observation that adding one or more roads to a road network can slow down overall traffic flow through it. The paradox was first discovered by Arthur Pigou in 1920,[1] and later named after the German mathematician Dietrich Braess in 1968.[2]
The paradox may have analogies in electrical power grids and biological systems. It has been suggested that, in theory, the improvement of a malfunctioning network could be accomplished by removing certain parts of it. The paradox has been used to explain instances of improved traffic flow when existing major roads are closed.