Direct answer from the person in who placed the camera here when I asked her about it.
*quote*
Sure. I can explain. I am a final year student from nus who is currently working on mammal roadkill. These devices are camera traps which allow me to record situations on the road to find out whether any animals are crossing at these areas and how many got killed by vehicle collision.
Upper thomson road is one of the locations in which a previous research had found to be a site where mammals often got killed. The images captured by these devices would be kept confidential and only for research purposes.
My research will end sometime next year (around march) and all the devices would be taken down. I understand that the drivers are sensitive to this stuff so the cameras are placed “ideally” in the direction of the traffic flow. Pls rest assured that is not some speed cameras and any information would not be disclosed.
Source: FB post by James Poon