Claim: There is no "incontrovertible proof that speed, in and of itself, is the contributing factor to increasing  fatalities."
Fact-check:  There is no 'incontrovertible proof that speed, in and of itself,' increases fatal accidents, Rep. Matt Caldwell says
Verdict: half-true
Organisation: PolitiFact
Author: Joshua Gillin
Date published: 2014-05-12T00:00:00