Filled with cracks, potholes, and construction zones, navigating Colorado’s roadways can put drivers to the test. To those navigating the Centennial State on a regular basis, it likely comes at no surprise that the local roads are among some of the worst in the United States.

According to a recent analysis from MoneyGeek, Colorado has the 15th-worst roads in the nation among the 50 states, plus DC. It’s estimated that 18 percent of Colorado’s roads are in ‘poor’ condition, with just 42 percent of Colorado’s roads in ‘good’ condition. Granted, this compares to 83 percent of roads being in ‘poor’ condition in Washington DC (the worst in the country) and 38 percent of roads being in ‘poor’ condition in California (the worst among the states).

A key reason Colorado’s roads get so bad is the ‘freeze-thaw‘ factor that comes with winter weather. This occurs when water in cracked pavement freezes, expanding and causing the crack to grow with it.

Across all criteria, the best roads were found in Oklahoma, where just 8 percent of roadways were in ‘poor’ condition. The state with the lowest percentage of ‘poor’ condition roadways was Florida, at just 5 percent.

Find the full results and methodology of this analysis here.