Two Colorado researchers are trying to find out why cyclists knowingly break road laws.

Wesley Marshall, a graduate student at CU Denver, and Aaron Johnson, a graduate student at CU Boulder and instructor at Metro State University, conducted a survey between January 2015 and March 2015 from nearly 18,000 cyclists.

Through a series of 20 questions, participants were asked what infractions they commit most often and why. The response overwhelmingly showed cyclists blowing through red lights as the most common infringement.

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The study cites a separate study, conducted in Australia, that showed 37 percent of cyclists rode through a red light illegally within the last month, with a similar U.K. study showing 32 percent of respondents rode through a red light.

The cyclists' reasons for doing so, in order, were perceived increase in safety, conservation of time, and conservation of energy.

The study also shows cyclists ran through red lights significantly less often when traffic was in the area. The study was just released last month, but it took place two years ago.