".....These are the drivers that need to pass you on the interstate, then cut across your front bumper in following space you allow, rather than the 20 car length space behind you....."
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I don't fully understand what you're saying. So, how can someone "cut across my front bumper" without me starting to slow down the instant I see them start to come into my lane?
Still, if they are only a few feet ahead me "slamming on their brakes" it's no reason for me to lose control of my vehicle.