Al Hartmann | The Salt Lake Tribune Commuters endure a messy commute along I-80 near the mouth of Parley's Canyon Monday Dec. 29, 2014. Advisory sign flashes that chains are required for semis traveling up the canyon. UDOT has created a social media channel geared toward Park City-area skiers and snowboarders that will alert them to issues in the canyon as well as four other major arteries to Deer Valley Resort and Park City Mountain. It is expected to begin posting Jan. 22, 2025.