I'm not familiar with that specific area of Denver, but I grew up in Colorado Springs which has similar patterns of suburbia and I've spent some time riding through other parts of Denver, so that style of neighborhood is something I'm very familiar with. I think 11% is about right: there's a few bike lanes and the trail that parallels E-470, but that's about all that's there specifically for people on bikes. The expectation is that everyone will drive an automobile for 100% of trips and this is clearly indicated by the street layout, intersection designs, and land use patterns. All journeys require using high-speed arterial roads. That doesn't mean you can't ride a bike there, but the only people likely to ride bikes there are strong, fit, and confident road cyclists. Anyone who's not in that group is likely to ride on the sidewalks if they ever get on a bike at all.