I have a 40 minute work to work that passes by a bakery. Sometimes I take the bus which passes right by that same bakery. Sometimes I drive which passes by the same bakery. I have stopped in that bakery while driving, and while walking, it make no difference. In fact the car is more flexible because a 5 minute detour lets me stop by a supermarket that is an extra 15 minutes while walking. (the bus only comes every 30 minutes so stopping in the middle to run errands isn't practical even though it detours to that supermarket)