路床 is read as ろしょう (roshou) and means roadbed.
ろしょう
roshou
ろかた
shoulder (of a road)
ろせん
route (bus, train, air, etc.)
ろせんず
route map (for buses, trains, etc.)
ろせんばす
bus on a regular route
ろそくたい
pedestrian walkway along a road
ろじうら
back street
とこ
alcove
きしょう
rising (from one's bed)
ねどこ
bed
びょうしょう
sickbed
おんしょう
hotbed
ゆか
dining platform built across a river