Cite as: 512 U. S. 374 (1994)
Opinion of the Court
public interest. Id., at 835. We also agreed that the permit condition would have been constitutional "even if it consisted of the requirement that the Nollans provide a viewing spot on their property for passersby with whose sighting of the ocean their new house would interfere." Id., at 836. We resolved, however, that the Coastal Commission's regulatory authority was set completely adrift from its constitutional moorings when it claimed that a nexus existed between visual access to the ocean and a permit condition requiring lateral public access along the Nollans' beachfront lot. Id., at 837. How enhancing the public's ability to "traverse to and along the shorefront" served the same governmental purpose of "visual access to the ocean" from the roadway was beyond our ability to countenance. The absence of a nexus left the Coastal Commission in the position of simply trying to obtain an easement through gimmickry, which converted a valid regulation of land use into " 'an out-and-out plan of extortion.' " Ibid., quoting J. E. D. Associates, Inc. v. Atkinson, 121 N. H. 581, 584, 432 A. 2d 12, 14-15 (1981).
No such gimmicks are associated with the permit conditions imposed by the city in this case. Undoubtedly, the prevention of flooding along Fanno Creek and the reduction of traffic congestion in the Central Business District qualify as the type of legitimate public purposes we have upheld. Agins, 447 U. S., at 260-262. It seems equally obvious that a nexus exists between preventing flooding along Fanno Creek and limiting development within the creek's 100-year floodplain. Petitioner proposes to double the size of her retail store and to pave her now-gravel parking lot, thereby expanding the impervious surface on the property and increasing the amount of storm water runoff into Fanno Creek.
The same may be said for the city's attempt to reduce traffic congestion by providing for alternative means of transportation. In theory, a pedestrian/ bicycle pathway provides a useful alternative means of transportation for workers and shoppers: "Pedestrians and bicyclists occupying dedicated
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