You are approaching the crest (top of a hill) on a narrow road, the safest procedure is to
Keep to the left and slow down
Flash your headlights to warn oncoming traffic
Increase your speed and sound your horn
Explanation: On single-lane roads, you must stay as close as practical to the left side of the road. On multi-lane roads, if the posted speed limit is 90km/h or more, or if the road has a 'keep left unless overtaking' sign, you must not drive in the right-hand lane unless you are overtaking.
