They then persuaded small towns on the Trail to join the organization, paying a small fee to be included in the route's publicity materials. The Yellowstone Trail Association also served information needs of travelers, much as the AAA—American Automobile Association had been doing for drivers in the United States. The Trail Association published maps and brochures, and established information bureaus in popular hotels and in tents along busy sections of the Trail, to hand out these materials. Travelers could telephone the Trail Association before planning a trip to see which roads were passable. The information bureaus also provided local information, much as Convention and Visitors Bureaus were to do in the present day. As road systems in the United States matured, larger and larger portions of the Yellowstone Trail became the responsibility of governments. For example, in Wisconsin, much of the Yellowstone Trail was designated with State Highway 18 in 1919. State Highway 18 then became U.S. Route 10 through Wisconsin, with the creation of the United States Numbered Highway System in 1926. Changes like these made privately managed road trails like the Yellowstone Trail less relevant. Cities along their routes increasingly stopped paying dues to the Trail Association. After the Great Depression began in 1929, the Yellowstone Trail and other named Auto Trails lost their allure and affordability. The main Yellowstone Trail Association office was closed on March 15, 1930. Its replacement organization, the Yellowstone Highway Association, operated marginally until around 1939. In the Eastern United States, the Yellowstone Trail Association exerted little influence on the road's routes. Instead it functioned primarily as a travel information bureau to entice tourists westward along the Trail. A few streets and roads retain the Yellowstone Trail name in the East, and some former sections remain as unimproved roads. In general, the "original" Yellowstone Trail garages and route signs are gone, though efforts to revive knowledge of the Trail in some sections of the country have been undergone in the 21st century for tourism reasons. Former sections, some with signage, still exist in travelable condition in Wisconsin, Montana, and Washington.