Jalan Sungei Poyan
Jalan Sungei Poyan is a road, mostly when it come out from Choa Chu Kang Road dead end, that leads into some army camp or somewhere. It leads into the live-firing area, of which it is at Poyan Reservoir. Only 3-tonners and 5-tonners can go in. This road had even steep cliffs.
Only the public maps can show their limited area, of which it is not possible to go to Pasir Laba Road.
As such, these roads are unpaved, and you can't get out of the place, if there is no 3-tonners and 5-tonners. Of course, there are private hire buses in order to go in.