There are a few special signs designated for Hong Kong trams. Some are still exist today. Take a shot when you notice them.
The left one is “Go” (“去”in Chinese), generally can be seen at the termini. The pictured one is at North Point. What amazing is the right one, “Stop” (“停”in Chinese), which depends on the traffic condition.
This one was temporary used during the tracks re-alignment at Shek Tong Tsui, where the former coastline encircled by the barges nearby.
In some spots trams follow the “T” traffic lights (pictured on the left), probably indicates the short-term of “Tram”. Here we see tram 300 transporting a truck which mainly can be seen in the depot.