Comment by saalweachter

What are "the actual safe limits of modern cars"?

Data from various states raising their limits over the last few decades is that every 5MPH increase in state speed limits brings with it an 8.5% increase in traffic fatalities on freeways. With the 70MPH speed limit common for freeways through most of the US, we're already up 25% on road fatalities over the 55MPH that was chosen for gas mileage during the oil crisis.

For cities, pedestrians struck at 25MPH are already at a 10% chance of death, which reaches 50% at 40MPH.