The speed limit is (in the USA) supposed to adhere to the 85th percentile rule, that being the speed at which people drive on a free-flowing road with no traffi

The speed limit is (in the USA) supposed to adhere to the 85th percentile rule, that being the speed at which people drive on a free-flowing road with no traffic and no enforcement. Most freeways have speed limits that are probably closer to the 0th percentile than the 85th percentile. I know driving the speed limit on some roads in my neck of the woods would be utterly hazardous.