@article{ref1,
title="History of sidewalks and Japan -- a study on transition of the structural standard",
journal="IATSS research",
year="1982",
author="Niitani, Y",
volume="6",
number="1",
pages="37-48",
abstract="With increases in traffic volume Road structural standards have undergone several revisions.  This paper is a history of sidewalks and how they are provided for in the statute of standard road structure.<p />",
language="",
issn="0386-1112",
doi="",
url="http://dx.doi.org/"
}