I used to cycle up/down here until I found the cycle route that follows the tracks via Grierson Road. The cycle route is marked, but when I started going this way it was the winter (dark) and its not easy to see, or work out how you can get across the tracks (there is a cycle/pedestrian bridge behind Brockley). It may be fractionally further this way, but the savings in safety are huge!

I've also found that as a pedestrian, cars rarely stop for you at the pedestrian crossing near the HOP station on weekends, presumably so they can get speed/carry speed up/down the hill. Its fine during the week, the traffic is so slow they generally dont mind stopping..