 Kristiania Elektriske Sporvei

A/S Kristiania Elektriske Sporvei or KES, nicknamed the Blue Tramway (), was a company which operated part of the Oslo Tramway between 1894 and 1924.It built a network of four lines in Western Oslo, the Briskeby Line and the Frogner Line which ran to Majorstuen, and two other consecutive lines, the Skøyen Line and the Lilleaker Line.