Why Colorado asphalt cracks faster than almost anywhere else

Front Range pavement takes more abuse than pavement almost anywhere in the country, and it comes down to three things: altitude, temperature swings and water.

At elevation, UV exposure is far more intense. UV oxidizes the asphalt binder that holds the aggregate together, which is exactly why old pavement goes from black to gray and starts raveling loose rock.

Then there are the freeze-thaw cycles. Colorado Springs can swing forty degrees in a single day. Water gets into a hairline crack, freezes overnight, expands, and widens the crack. Do that a hundred times a year and a crack becomes a pothole.

Finally, sudden heavy moisture — afternoon monsoon storms and fast spring melt — puts more water into the sub-base than pavement drains built for gentler climates ever see.

The fix is not exotic. Keep water out of the base with crack sealing, keep UV off the binder with seal coating, and make sure the grade actually drains. Pavement maintained that way lasts twice as long.