You said it was impossible to bike 15 miles to work, regardless of available bicycle infrastructure. I said it is very much possible, and these were middle-age

You said it was impossible to bike 15 miles to work, regardless of available bicycle infrastructure. I said it is very much possible, and these were middle-aged people, not athletes by any measure. Biking is a very energy-efficient mode of transport, it really doesn't take long before you're able to ride 20 or 30km in a single stretch.