At the specified intersection, which vehicle must wait before proceeding?

The vehicle that must wait before proceeding in this scenario is Vehicle 1. In most traffic situations, when approaching an intersection, vehicles are required to yield to other traffic based on traffic signals, signs, or the right-of-way rules. If Vehicle 1 is in a position where it does not have the right-of-way—such as being on a minor road while other vehicles are on a major road or if there is a stop sign controlling Vehicle 1’s movement—then it must wait for an appropriate gap in traffic before making its turn or crossing the intersection.

Understanding the principles of right-of-way is essential for safe driving. Certain vehicles may have priority over others, based on established rules or traffic signs present at the intersection. This ensures safe and orderly traffic flow and helps prevent accidents. Therefore, if Vehicle 1's situation places it in a position of needing to yield, it must wait until it is safe to proceed.