When and why did we collectively decide that Speed Limit signs mean “minimum expected speed” rather than “maximum allowed speed” as the word “limit” would suggest? /u/HawaiianShirtsOR No such thing as stupid questions

I’m teaching my teenage son how to drive, and this question has come up several times. I’ve noticed it too, but never thought to ask.

By the definition of the word “limit,” I would think that the Speed Limit sign means, “This is the highest speed you’re allowed to drive on this road.” But the way drivers behave, it seems to actually mean, “This is how fast you’re expected to drive here, and if you’re not driving this speed or faster, you’re in the way.” Why?

I’m teaching my teenage son how to drive, and this question has come up several times. I’ve noticed it too, but never thought to ask.

By the definition of the word “limit,” I would think that the Speed Limit sign means, “This is the highest speed you’re allowed to drive on this road.” But the way drivers behave, it seems to actually mean, “This is how fast you’re expected to drive here, and if you’re not driving this speed or faster, you’re in the way.” Why?