In our practice, we often see cases where both drivers involved in a collision thought they had the right of way. Often, such cases involve a situation where one driver is proceeding straight through an intersection and the other is attempting to make a left turn on a yellow (or amber) light. The driver proceeding straight believes they have the right of way. At the same time, the driver making the left turn believes that the driver going straight is required to stop and, so, they have the right of way to make their turn.
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