The "Long Trail" followed the Peace River 530 across northern AB. As the flow of traffic increased due to the fur trade industry along the Long Trail, stopping places developed providing rest and food for travelers. In 1923, the three routes out of Lac La Biche were to the west, which corresponds to the route of AB Hwy 55 along the south shores of Lesser Slave Lake. Edmonton or Saddle Lake trail departed to the south, which would be the initial stages of AB Hwy 55 out of Lac La Biche. Heart Lake trail traveled northeast from Lac La Biche, which would form a base for secondary AB Hwy 858. Work was done on the Athabaska Trail to make it passable for motor traffic as many roads had been graded. Before stopping places developed, caches were set up at stopping points along the way. Before the arrival of rails the waterways such as the Lesser Slave Lake near Athabasca, Alberta and the Saskatchewan River near Prince Albert were traversed by long boat, canoe, and steamship. The rail did not reach the northern areas until the early twentieth century due to the geological hurdles of mountains, muskeg, swamp, boreal forest, and river systems to traverse. A huge flood in 1899 near The Pas left no ground to walk upon, yet the railway track construction work began in 1906, with more continuing in 1911. In 1928, the Canadian Pacific Railway (CPR) surveyed their line across the Saskatchewan River near Prince Albert, and contractors started work on the bridge. The upper deck served the train, and the lower deck was built for highway traffic opening for vehicles in 1932. In 1929, travel was overland on trails, and rivers were forded in many places.