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
ろひょう
road sign
ろめんとうけつ
road surface freezing
じばん
foundation (building, etc.)
きばん
bedrock
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)
ごばん
Go board
しゅうばん
endgame
らしんばん
compass