關於「Route number」標籤，搜尋引擎有相關的訊息討論：

Taiwan - Road numbering systems - Google Sitessites.google.com › site › home › countries › taiwanBus Services - Singapore - Land Transport Authority (LTA)www.lta.gov.sg › content › ltagov › map › busSBSTransitwww.sbstransit.com.sga guide to public transport and travel mobile ap