The planked approaches to the Nooksack River bridge were deemed too narrow for automobile traffic and widened by in 1919. Further paving projects on sections of the Guide Meridian were contracted by the county government between 1920 and 1932, completing a paved highway from Bellingham to the Canadian border. The British Columbia government announced plans in 1931 to link the improved Guide Meridian to the Fraser Highway via a new paved highway. In 1951, the Nooksack River bridge near Lynden was disassembled and moved upstream to Mosquito Lake Road as part of a widening project on the Guide Meridian.