..is what I was responding to.

>We can’t say that emergency vehicles should just stay in on dark and stormy nights.

This conclusion is flawed and doesn't apply to what I said.

If a truck can't see (conditions or not), then they shouldn't be on the same runway as takeoff/landing because...the consequences were severe despite the safeguards you mentioned, e.g. Not driving fast is relative and the "eyes" failed too initially.