If you were driving the blue Prius in the situation pictured above, explain why the red Mustang should be given right-of-way at this intersection.

The red Mustang should be given the right-of-way at this intersection because:

The red Mustang arrived first before the blue Prius and is closer to the stop sign before the arrival of the blue Prius.  This implies that the red Mustang must have waited for its turn, unlike the blue Prius that just arrived at the intersection.

Explanation:

Traffic laws, regulations, and IPDE defensive driving strategy require that drivers always give way to the vehicle that arrived before them at an intersection.   Assuming that multiple vehicles reach the intersection simultaneously, then the vehicle must be given the right-of-way.  Alternatively, the traffic lights at the intersection should be obeyed and be allowed to regulate the movement of vehicles.  IPDE defensive driving strategy requires drivers to be watchful of their driving spaces to determine the appropriate time to move.