If that’s true, then it would be a good idea to have everybody converge on a particular speed. It doesn’t seem practical to negotiate that speed amongst a constantly-changing set of drivers, it probably needs to be chosen in advance. That seems like a natural function of government, to choose the consensus speed through a process designed to represent everybody in the community.

To communicate to drivers entering the roadway this consensus speed which everybody must travel at—for safety—the government could, say, post it on signs located along the roadside.

But that’s probably just a ridiculous fantasy. How then should all drivers negotiate the consensus speed to ensure safety?