Four electrified suburban lines radiate from Wellington railway station to the outer suburbs to the north of Wellington – the Johnsonville Line through the hillside suburbs north of central Wellington; the Kapiti Line along the NIMT to Waikanae on the Kapiti Coast via Porirua and Paraparaumu; the Melling Line to Lower Hutt via Petone; and the Hutt Valley Line along the Wairarapa Line via Waterloo and Taitā to Upper Hutt. A diesel-hauled carriage service, the Wairarapa Connection, connects several times daily to Masterton in the Wairarapa via the  Rimutaka Tunnel. Combined, these five services carry 11.64 million passengers per year.