Final answer:
The driver on the left must yield to the driver on the right is a traffic rule requiring the driver on the left to wait for the driver on the right to proceed first, reducing risks of collisions.
Step-by-step explanation:
When we say that the driver on the left must yield to the driver on the right, it refers to a common traffic rule that is designed to prevent accidents and ensure a smooth flow of traffic at intersections, especially when traffic signals or signs are not present. In situations where two drivers approach an intersection from different roads at the same time, this rule requires the one on the left to allow the one on the right to go first. Yielding means to slow down or stop and wait until it is safe to proceed. It's an important principle that helps in minimizing confusion and collision risks at intersections.