The Haller Willem quickly became a mainstay of the economy in the region. Natural resources were transported out of the Teutoburg Forest, but it also brought workers and school students to the towns. It also connected with some tourist destinations. On 6 February 1905, the railway division (Eisenbahndirektion) of Munster, announced that they wanted to raise the speed limit on the line to 50 km/h. The infrastructure, especially the level crossings, were improved for this purpose. Already six services ran on the Haller Willem in the timetable of 1905. Travel time was cut to only around two hours as a result of the structural improvements. Services were increased up to the First World War to five pairs of trains and seven more running on part of the line. After the First World War there were six pairs of trains and a pair of trains that went only as far as Wellendorf. The travel time of the fastest trains was reduced to only one hour and 45 minutes. In addition, six freight trains operated, although it is not known what they carried.