Michigan has used the movable barrier wall on 4 or 5 projects in work zones. The state has used these on freeways where traffic is switched from one side of the road to the other. The zipper wall is … [Read more...] about Temporary Movable (“Zipper”) Barrier systems in work zones
Temporary Concrete Barriers
Temporary Movable (“Zipper”) Barrier systems in work zones
NCDOT uses movable barrier quite extensively in its work zones, mostly on interstate rehabilitation projects. The barrier system was used on I-95 to close one lane Monday thru Thursday and open it up … [Read more...] about Temporary Movable (“Zipper”) Barrier systems in work zones
Temporary Movable (“Zipper”) Barrier systems in work zones
New York has used movable concrete barrier. The New York Thruway Authority has a permanent movable barrier operation on the Tappan Zee Bridge carrying I-87 and I-287 across the Hudson River. Lanes are … [Read more...] about Temporary Movable (“Zipper”) Barrier systems in work zones
Temporary Movable (“Zipper”) Barrier systems in work zones
California has used the "zipper" barrier a few times. However, no standard has yet been developed for its use. … [Read more...] about Temporary Movable (“Zipper”) Barrier systems in work zones
Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
Standard 701321-02 shows Illinois' basic object marker barrier wall attachment. Most designers are now opting for the Detail A option using barrier wall reflectors. This marker attachment design has … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
Michigan DOT's current practice is to delineate the temporary concrete barrier (TCB) with barrier markers placed at 6m max spacing at a height of 460 + 25mm from the bottom of the barrier marker to … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices