Travelers to Yellowstone should prepare for potential delays and closures due to road construction and weather conditions. High-elevation roads, such as Dunraven Pass and Beartooth Highway, are particularly susceptible to early closures from snow. Construction zones, like the Gardner River High Bridge, may cause traffic delays and restrict access for oversized vehicles. Visitors should also be cautious of wildlife and heavy equipment in these areas. Those planning trips during the winter season should note that oversnow vehicle routes will open starting December 15, 2026, but are subject to weather-related changes.