Resident Office moved from Marudi to Miri in 1912. Miri grew as fast as the rate of oil production by the Shell company. In 1920, roads were built in Miri. Bicycles and motorcycles were also bought into the town. By 1921, there were 40 shop houses in Miri, with one English school and one Chinese school. Motor cars were later introduced to the town. In 1924, Pujut Road was built to link Miri with Lutong. By 1925, rotary drilling was introduced. Oil production continued to increase until it reached a peak of per day in 1929. Water supply were improved, jungles were cleared, and more roads were built. Miri became the administrative centre of the entire Baram region in 1929.