Thanks to all for the advice. As of this mon=ment, I cannot see my way clear to try the commute, or even a reasonable subset of my commute by bike. It is just too complicated. I don't have the level of fitness required for a 92 mile-a-day round trip, and there is not good intermediate method. From time to time I see shattered glass in the park and ride from which I take my commuter bus, bearing silent witness to the fact that a car had been broken into. I can only infer that any bike reasonably equipped for twilight travel and moderate speeds would be a pile of trash if I were to park it there for more than a day or two. The other suggestions about carting the bike a significant portion of the way to work are intriguing, but would leave me with some of the worst traffic on my commute, which I currently glide by in a commuter bus using High Occupancy Vehicle (HOV) lanes. Although I am no wild-eyed environmentalist, I see no reason to inconvenience myself in an effort to pollute the environment.