Trans-Island Bus Services (TIBS) was formerly a public transport operator in Singapore. It was incorporated on 31 May 1982 by a firm of Singapore Shuttle Bus as a second full-day run bus service, following public transportation market liberalisation reform approved by parliament. The legislature thereafter proposed the formation of another public bus service provider to establish a duopoly, which would compete with Singapore Bus Services (now SBS Transit) in 1981. TIBS Holdings' core businesses were subsumed by SMRT Corporation on 10 May 2004 following merger.