PURPOSE: To obtain a composite measure used for various purposes by providing a through path opening to the ground surface on the upper part of the measure as well as a culvert with the orbicular cross section at the lower part.

CONSTITUTION: A measure is vertically divided by a center wall 92. A ceiling opening part 52 is provided at the upper part of the measure and an upper part through path 99 opening to the ground surface is provided. A lower part through path 99 formed of a culvert with the orbicular cross section is provided at the lower part of the measure so as to form an open-conduit type composite center wall measure for straight lines. In addition, a lid is placed on a ceiling part 81 according to the necessity.