There are more plausible explanations that have been extensively studied, like cars getting bigger. Where are the data showing a causal relationship between police enforcement of traffic laws over the past three years and increased pedestrian deaths? Do we even have indirect data, e.g. Sun Belt traffic enforcement declining more than in other states?
Not sure, and those are all good avenues for exploration. But it doesn’t look to me as if vehicle size, power, and weight can have caused the sudden increase because that happened over 20 years.
