(Leah Hogsten | The Salt Lake Tribune) Unified Police Department officers held up canyon traffic for a hour and a half on Tuesday as avalanche mitigation efforts were underway at Carter Fork, Mineral Slab and Rock House areas of Big Cottonwood Canyon, Feb 16, 2021. Winter drivers who want quicker access to the Cottonwood Canyons on snowy days have more options this year to get state-issued stickers that show their tires have been pre-inspected.