Accompanying a waterbar should be some sort of a turnout, more commonly referred to as a "wing ditch." As the overland flow is intercepted by the waterbar, it is diverted into the wing ditch and dispersed before it has the opportunity to gain speed and cause further erosion. It is also important to note that wing ditches should be constructed to be more flat than v-shaped. This encourages diverted flow to dissipate rather than be concentrated.
When constructing waterbars it is important to be sure that both ends are tied in to the edge of the road. This prevents "blow outs" or water from going around the waterbar.
Waterbars should never be constructed perpendicular to the road, this forms a dam, causing water to stand in the road. Even though any overland flow has been put to a stop, the integrity of the road has been compromised, due to the 90 degree waterbar with no turnout accompanying it.