St Kilda Road is a street in Melbourne, Victoria, Australia. It is part of the locality of Melbourne which has the postcode of 3004, and along with Swanston Street forms a major spine of the city. St Kilda Road begins at Flinders Street, in the central business district and crosses Princes Bridge, which spans the Yarra River and connects the central business district of Melbourne with the suburb of St Kilda, ending at Carlisle Street, St Kilda. The road continues as Brighton Road, which becomes the Nepean Highway, forming a major arterial connecting the bayside suburbs and Mornington Peninsula to the city.