道どう床しょうどうしょうMeanings1nounroadbedTechnical term in railway engineering for the foundation layer on which tracks are laid, including ballast and subgrade.道どう床しょうの状じょう態たいを定てい期き的てきに点てん検けんする必ひつ要ようがある。It is necessary to inspect the condition of the roadbed regularly.
