Right-of-way
Some T junctions are controlled by traffic lights, but others rely upon drivers to obey right-of-way rules. For example, a vehicle travelling on the major roads of the "T" typically has right-of-way, meaning that the vehicle approaching the "major" road must allow it to pass before joining the flow of traffic.
In the People's Republic of China, going straight on red when approaching a T junction on the main road with the intersecting road on the left was permitted until the Road Traffic Safety Law of the People's Republic of China took effect on 1 May 2004.
In Taiwan (administered by the Republic of China), when at least two vehicles reach a T intersection without a working traffic light, the vehicle on the side road is to yield to any other vehicle straight on the main road. If two vehicles want to turn left, the vehicle on the left is to yield.
Read more about this topic: 3-way Junction