PROBLEM TO BE SOLVED: To provide techniques for temporarily resolving a root exposure state of a street tree, even if it is a tree that has already lifted a curbstone by the root exposure.SOLUTION: The invention provides countermeasure methods for root exposure of a street tree, in which: a parallelepiped curbstone recently set to a street tree is replaced with a curbstone having an opening and a parallelepiped curbstone set around a street tree is replaced with a curbstone comprising a plate and an elastic body to be placed under the plate. The space required due to root exposure is secured by providing a space to the lower part of the conventional curbstone or by making a part to be a space be formed thereto.COPYRIGHT: (C)2015,JPO&INPIT【課題】本願は、既に根上で縁石を持ち上げた街路樹であっても応急的に根上状態を解消する技術の提供にある。【解決手段】街路樹の最近に置かれた直方体形状の縁石を開口部を有する縁石に置き換える街路樹根上対策方法であり、街路樹の周囲に置かれた直方体形状の縁石を平板と平板下に置く弾性体からなる縁石に置き換える街路樹根上対策方法である。従来の縁石の下部に空間を設けあるいは空間となる部分が生じるようにし街路樹の根上により要求される空間を確保した。【選択図】図2