It’s common for drivers to make the error of basing traffic choices on the car before them. Our actions frequently depend on the speed and brake lights we see in front of us, rather than nearby signage. It’s an easy trap to fall into–more so for experienced drivers. Having so little agency on the road can be dangerous. For instance, following the “flow of traffic” is not a valid excuse for a speed violation in most places. Jams and collisions occur when vehicles constantly accelerate just short of colliding with.

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