It does't help that the Google maps cycling directions are often woefully bad. I just put in my old (2 mile, downtown) Austin commute and the entirety of the suggested route was on streets I would never ride on for fear of my own safety, and my personal risk tolerance for these types of things is pretty high. There's protected bike line on most of 3rd street that can get you across the entirety of downtown and Google maps just ignores it.