Comment by volkl48

As someone in the Northeast US: Many of our highways were designed 80+ years ago, and do not have appropriate acceleration/deceleration lanes.

The terrible drivers are often those with the most timid inputs, especially with regards to acceleration. It is perfectly normal here to need to merge into heavy, 60mph+ traffic from a dead stop, or to need to quickly match speed and identify an appropriate merge spot to not wind up stuck at the end of a ramp.

And it's not like they sit there for 15 minutes waiting for some exceptionally large gap to match their acceleration habits - that would be very annoying to other drivers, but theoretically "safe". They enter in the same length gap as someone that actually uses their gas pedal - but rely on oncoming traffic to hit their brakes/evade, as they fail to get up to speed quickly enough for the small gap they've entered in.

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Hard braking is something with fewer reasons it should happen regularly - but I'm still reminded of the usual adage about metrics. Do you really want people to be mentally reluctant to hit their brakes as hard because of the insurance hit? That seems like a recipe for increasing decision time and accidents.