17.3.3 Working Width
Working width is the distance between the traffic face of the barrier before the impact and the maximum lateral position of any major part of the system or vehicle during the impact (see
). Working width is related to deflection but working width considers the lateral position of the vehicle or any portion of the system. Working width should be considered when placing any longitudinal barrier. The Working height is the corresponding height at the maximum lateral position of any major part of the system or vehicle.

Figure 17-2: Working Width