FREE-GRADIENT PORTAL SIDE DITCH FOR PRECAST CONCRETE STREET GUTTER HAVING APRON PAVED WITH ASPHALT

摘要

PROBLEM TO BE SOLVED: To form an asphalt pavement bicycle travel lane by eliminating a change of a 6% apron slope and a 2% roadway section cross gradient in a free-gradient portal side ditch having a top surface formed as an L-shaped street gutter.SOLUTION: The vicinity of a gutter bottom employs a drop cover with a curb, which serves as a top surface pavement stop. An asphalt top surface pavement with a 2% gradient is applied to a surface including an apron surface. A side strip suitable for bicycle travel is provided.SELECTED DRAWING: Figure 1