Had this happen to me when I was visiting Singapore. I was on the side of the road, but was not intending to cross it. Was just looking at some plants. A driver came up the road saw me, slowed down his car and stopped quite far from me.
I waved, indicating him that he could go on, but he waved back, telling me that I could cross. In the end I crossed the road and he went on his way. Then I crossed back
It was interesting and quite silent too. No horns were honked