Right now on Mondays and Wednesdays I have to work in a city about 50 km away and I drive the car about half way and cycle the rest. Takes me an hour each way on top of the half hour drive each way. I simply don't have the two hours it would take to get there by bike alone directly from home. A good chunk of the time would also be spent on a completely deserted rural trail and I am not sure whether my light set up would be good enough for it and in any case I would have to keep the revs down when it got dark and hence take longer to complete the trip. I am thinking of driving closer to work when it gets really dark at quitting time. On Tuesdays and Thursdays, I cycle from home to another workplace and it takes me 30-35 minutes each way. So I figure about 6 hours in the saddle every week plus whatever I do recreationally etc.