WSDOT has been interested over the past few years in temporary rumble strips, and has tried a few different types without much luck. The most recent product evaluated has been a temporary rumble … [Read more...] about Temporary rumble strips
Washington
Temporary Movable (“Zipper”) Barrier systems in work zones
WSDOT owns a couple of the movable barrier systems and has used them primarily on interstate freeway HOV widening projects over the past several years. They work well in adding an additional level of … [Read more...] about Temporary Movable (“Zipper”) Barrier systems in work zones
Truck-Mounted Attenuator (TMA) requirement
WSDOT does not require the use of TMAs but they are highly recommended for many work operations. For WSDOT construction projects TMAs are routinely included as a per each bid item in the contract. If … [Read more...] about Truck-Mounted Attenuator (TMA) requirement
Contractor identification sign in work zones
Washington DOT allows the use of contractor identification signs on projects and has developed criteria for their use. There are two signs that are used and the criteria can be viewed at the following … [Read more...] about Contractor identification sign in work zones
Time frame allowed for lane closure setup (e.g., 9:00am to 3:30pm)
In Washington: - Lanes cannot be closed until 9am, but the contractor could place drums or cones along the side of the road. - Signs could not be displayed until 9am, but the contractor could place … [Read more...] about Time frame allowed for lane closure setup (e.g., 9:00am to 3:30pm)