Many thanks for your reply (and for this great course). You've mentioned in the notes to this skill that ехать is only used when describing motion into one direction, but I think that as far as language is concerned you can make repeated trips to one place (i.e. the focus of the sentence is on the fact that you are regularly heading to that place). I have found this handy example in Terence Wade's reference grammar: Каждый год, как только наступает лето, я еду на море. So I guess that the action described by the various forms of ехать may (in some rather contrived cases?) be a repeated one, but it nonetheless has to be very punctual and take place at a very specific moment of time.
Yes, you have to be very specific usually. Like saying that you go to a seaside as soon as the summer starts (but obviously you go back home at some other time). Or you can specifically say that you always go to work in the morning on your bike.
Though, we don't have such sentences in the course because it would be rather confusing.