2012 Volume 68 Issue 1 Pages 15-29
This study aims to find an effective removal method of illegal parking bicycles based on the analysis on the numerical change of illegal bicycles. And then, we built the time and space quantitative distribution model of illegal parking bicycles after removal, considering the logistic increase of illegal parking bicycles, several behaviors concerning of direct return or indirect return to the original parking place and avoidance of the original parking place, based on the investigation of real condition of illegal bicycle parking at TENJIN area in FUKUOKA city.
Moreover, we built the simulation model including above-mentioned model, and calculated the number of illegal parking bicycles when we change the removal frequency and the number of removal at one time. The next interesting four results were obtained.
(1) Recovery speed from removal the illegal parking bicycles differs by each zone.
(2) Thorough removal is effective to keep the number of illegal parking bicycles lower level.
(3) Removal at one zone causes the increase of bicycles at other zones where the level of illegal parking is lower.
(4) The relationship between effects and costs of removing the illegal parking bicycles was clarified.