When may vehicle 1 proceed?

Vehicle 1 is allowed to proceed when it has the right of way, indicating that it can go before vehicle 2. Understanding right-of-way rules is crucial in traffic management, particularly in scenarios where multiple vehicles may be interacting at intersections or during lane changes.

When vehicle 1 has the right of way, it means that other vehicles must yield and wait for it to pass. This ensures a safe and organized flow of traffic, reducing the risk of collisions. Drivers must be aware of these rules and the specific circumstances that grant one vehicle precedence over another.

In situations where clearance is involved, as highlighted by other choices, vehicle 1 would not necessarily have the authority to proceed without understanding the context of its right of way. Signaled directions and assessing traffic clarity are also critical components of ensuring a safe passage, but they do not apply if vehicle 1 inherently has priority over vehicle 2.