I just recently started riding a road bike. I find myself having to watch the road condition like a hawk all the time to avoid running into anything. Moreover, because of the dropbars, I find that I am unable to look farther ahead or my neck hurts. I must be doing something wrong. What obstacles are safe to run over? Acrons? Pebbles less than an inch? Uneven asphalt, particularly near the edge of the manhole?