Final answer:
At a 'T' intersection without a posted traffic sign or light, the driver on the through road has the right of way and the driver on the terminating road must yield to them.
Step-by-step explanation:
At a "T" intersection without a posted traffic sign or light, the driver on the through road has the right of way. The driver on the road terminating at the intersection must yield to all vehicles on the through road. This means that if you are approaching a "T" intersection without signs or lights, you should yield to any vehicles coming from the through road and wait for them to pass before proceeding.