路盤 is read as ろばん (roban) and means roadbed.
ろばん
roban
ろぼう
roadside
ろせんか
roadside land prices
ろめんとうけつ
road surface freezing
ろひょう
road sign
ろせんにそって
along the route (line)
ろぼうのひと
utter stranger
じばん
foundation (building, etc.)
きばん
bedrock
そろばん
abacus
えんばん
disc media (CD, DVD, etc.)
けんばん
keyboard (of a piano, typewriter, etc.)
ちゅうばん
midfield (in soccer)