That's assuming you're varying only speed and not e.g. following distance. I try to leave at least 3 seconds' distance pretty much always (often more), so I have a pretty consistent amount of time to react regardless if I'm driving 30 mph or 55 mph.
Additionally, most of the metrics are cut-offs. It doesn't matter if you brake very gradually or if you brake very close to the area where it penalizes you. Based on my driving so far, the hard braking threshold is pretty forgiving. Yesterday, I let off the accelerator completely and went full-regen braking and it didn't care.
Anyway, I've driven 99 miles (highway/city mix) with the Safety Score thing turned on, and I'm still at score 100. I haven't slowed down at all.
Additionally, most of the metrics are cut-offs. It doesn't matter if you brake very gradually or if you brake very close to the area where it penalizes you. Based on my driving so far, the hard braking threshold is pretty forgiving. Yesterday, I let off the accelerator completely and went full-regen braking and it didn't care.
Anyway, I've driven 99 miles (highway/city mix) with the Safety Score thing turned on, and I'm still at score 100. I haven't slowed down at all.