The county council debated conversion of the line to standard gauge in 1910, and issued a request to the government. It considered the question in 1912, and granted funding for preliminary surveys. After petitioning from most municipal councils and various commercial interests in 1913, Parliament agreed to the funding in April 1914. A railway committee was established, and Drammen District proposed that its lines be converted. By the time the issue had reached Parliament in 1923, a conversion of the Vestfold Line had fallen out of the plans. However, several of the surrounding railways were converted to standard gauge.