workzonesafety.org - Variable Speed Limits Signs: Effects on Speed and Speed Variation in Work Zones - Comments http://www.workzonesafety.org/research/record/9947 Comments for "Variable Speed Limits Signs: Effects on Speed and Speed Variation in Work Zones" en Variable Speed Limits Signs: Effects on Speed and Speed Variation in Work Zones http://www.workzonesafety.org/research/record/9947 http://www.workzonesafety.org/research/record/9947#comment Books and Reports Speed Control Speed Limits Temporary Traffic Control Variable Speed Limit Systems Fri, 16 Oct 2009 11:48:17 -0500 j-whipple1 9947 at http://www.workzonesafety.org