Actv S.p.A. (Azienda del Consorzio Trasporti Veneziano) is a public company responsible for public transportation in Venice and Chioggia municipalities and for interurban bus services in province of Venice. ACTV is not responsible for Venice People Mover (managed by AVM) and waterbus routes between airport and the lagoon area (managed by Alilaguna). Connections by bus with Venice airport are managed by ACTV and by ATVO. The main public transportation means are motorised waterbuses (vaporetti), which ply regular routes along the Grand Canal and between the citys islands. Lido and Pellestrina are two islands forming a barrier between the southern Venetian Lagoon and the Adriatic Sea. On those islands road traffic is allowed. There are bus services and waterbus services linking the islands with other islands (Venice, Murano, Burano) and with the peninsula of Cavallino-Treporti.