Best Practice

BEST PRACTICE:

G4-20: Mobile Barrier Systems

DESCRIPTION:

A Mobile Barrier System (MBS) is an all-in-one protection system integrated into a trailer unit configuration, creating a protected space for workers behind a barrier wall on the side of the MBS unit adjacent to traffic. The MBS is designed to be driven into place and put in use while remaining attached to the tractor unit. The MBS may be equipped with crane, hauler, lights, power and air tools, carrying materials, and supplies for workers. A crash attenuator may be integrated into the MBS unit or may be provided on a separate vehicle behind the MBS trailer. Some MBS systems can expand in length once on-site, providing space for longer work zone activity areas where needed.

REASON(S) FOR ADOPTING:

An MBS provides a simplified approach for setup and removal of temporary work zone positive protection in conditions where space is constrained and maximizing traffic capacity is a priority. An MBS also aids constructability, as work zone protection areas are quicker to set up and dismantle which reduces setup/takedown times and increases construction windows. An MBS operator navigates the truck into the work zone area where the MBS trailer itself provides the desired protection against vehicular incursion into work zones. The MBS can thereby facilitate mobile work zones by its ability to move forward slowly as workers advance along the road. When the job is completed, the operator simply pulls away once workers are cleared from the protected area.

PRIMARY BENEFIT(S):

Benefits of an MBS include rapid setup and removal, improved protection to roadway crews, increased productivity, reduced distraction, reduced glare, and more flexibility in lane closure staging for short-term work zones. These systems further protect roadway crews by limiting their exposure during setup and removal times, and may also allow some work activities to be performed closer to live traffic lanes, reducing the number of lanes that need to be closed and improving traffic flow. These potential efficiencies help to reduce costs.

MOST APPLICABLE LOCATION(S)/PROJECT(S):

An MBS is ideally suited to short-term work zones on higher-speed facilities where the work being performed can be contained within the physical dimensions of the mobile barrier, and where rapid deployment and takedown or mobile operations are desirable.

STATE(S) WHERE USED:

California , Colorado , District of Columbia, Texas, Virginia

SOURCE/CONTACT(S):

Samir Ead, Construction Safety Coordinator, Caltrans
Phone: (916) 654-4580
E−mail: Samir.ead@dot.ca.gov