Michigan DOT has used portable changeable message signs and temporary static signs. They were placed quite some distance in advance of low clearance. … [Read more...] about Devices and early warning methods used to reduce hits on low-clearance structures
Communication and Control
Work zone use of steel plates
MoDOT does not have any specific guidance on the use/placement of steel plates; but they do have the following guidance on signing for them: From MoDOT Engineering Policy Guide, 616.6.46 STEEL … [Read more...] about Work zone use of steel plates
Work zone use of steel plates with bridge cuts in pavement
Steel plates must be cut out to grade or secured with hot mix material. Use requires a bump sign if the condition exists. … [Read more...] about Work zone use of steel plates with bridge cuts in pavement
Work zone speed limit
Advisory speed limits are used to identify safe speeds for a specific condition within a work zone. The signs are installed by the appropriate governing authority. Black-and-orange signs are used in … [Read more...] about Work zone speed limit
Work zone speed limit
Utah allows the project engineer to reduce the speed limit 10 mph at his/her discretion. Further reduction has to be approved by the region traffic engineer. This policy is presently under review. … [Read more...] about Work zone speed limit
Work zone speed limit
New Hampshire DOT does not have any formal policy in place regarding speed limit reductions in work zones. In their coordination meetings, the Bureau of Highway Design and Bureau of Construction … [Read more...] about Work zone speed limit