But it might be interesting to see to what extent "road cyclists" - at least forum members here - commute.

The cycling portion of my commute is a mile each way - a little more, or a little less, depending on where I manage to pick up a Citibike, and how round-about a route I want to take (usually not very). The bus portion is about 17 miles, and depending on traffic, that usually takes about an hour in the evenings, an hour 20 in the mornings. Funny thing: I can take a more direct route by bicycle and make it to the office in about an hour if I push it, about an hour 20 if I don't want to be all sweaty when I arrive. I've only done that twice. Main reason I don't do it more often is that I don't like to ride in the dark, and the only time that wouldn't be an issue is in mid-summer, when arriving at the office all sweaty would be the issue. I've had occasion to drive a couple of times, and it takes about the same amount of time in traffic, but parking is a killer (about $40 for the day).

An acquaintance of mine - official for park races, actually - commutes year-round from a town a couple miles north of me.