One major complaint from Coloradans old and new is the amount of traffic that clogs the roads to the mountains. There’s nothing worse than getting ready for a ski day only to be stuck in what essentially becomes a parking lot for hours on I-70. But is I-70 really the busiest road in the Centennial State? Here’s a look at a few of the most iconic roads in Colorado and how many cars travel them every day. These numbers come from the Colorado Department of Transportation, and represent an average of drivers per day based on totals for 365 days a year.

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11. Red Mountain Pass

— 1,800 Vehicles Per Day (Technically open year round, but it closes periodically due to snow, mudslides, and rockslides.)

— 10.3% Trucks

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10. Highway 24 at Wilkerson Pass

— 2,200 Vehicles per day

— 9.5% Trucks

9. Monarch Pass

— 2,400 Vehicles per day

— 13.3% Trucks

8. Mount Evans Scenic Byway

— 890 Vehicles per day (2,700 per day adjusted for open dates totaling roughly 4 months.)

— 1.2% Trucks

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7. Hoosier Pass

— 3,800 Vehicles Per Day

— 6.3% Trucks

6. Highway 285 Between Denver and Fairplay

— 5,300 Vehicles per day

— 9.1% Trucks

5. Trail Ridge Road

— 4,300 Vehicles Per Day (10,500 per day adjusted for open dates totaling roughly 5 months.)

— 1.3% Trucks

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4. I-25 Between Colorado Springs and Pueblo

— 35,000 Vehicles per day

— 9.9% Trucks

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3. I-70 at Idaho Springs

— 44,000 Vehicles per day

— 7.6% Trucks

2. I-25 at Castle Rock

— 73,000 Vehicles per day

— 5.8% Trucks

1. U.S. 36 Between Denver and Boulder at Superior

— 82,000 Vehicles per day

— 2.2% Trucks

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