I drove in today. The main reason is: for the last couple of days, I've had some pain in the area of the right foot arch. It's difficult to describe it - a bit like a shooting pain when comes and goes when I am walking. It isn't constant, happens sporadically. There is no swelling or inflammation that I can see. I'm taking a couple of days off from cycling, will visit a podiatrist if it continues/worsens. Just thought I'd check here if someone had a similar experience.

One thing to note: I've changed my cycling habits recently (since about a week). My route is still the same, but there is road work going on, so the lanes are much narrower. I could ride closer to the sidewalk before, and cars could pass comfortably. I've been forced to take the lane for almost a mile now, as a result, I'm going much faster - riding between 20 and 28 mph. Could this be related to the pain?

Anyway, my plan of action is to take a couple of days off, start again on Monday and take a different, slower route. Hopefully that will help. Any other suggestions?