Toolbox of Countermeasures for Rural Two-Lane Curves

Status:  Complete
Report Date:  11/01/2013


The Federal Highway Administration (FHWA) estimates that 58 percent of roadway fatalities are lane departures, while 40 percent of fatalities are single-vehicle run-off-road (SVROR) crashes. Addressing lane-departure crashes is therefore a priority for national, state, and local roadway agencies. Horizontal curves are of particular interest because they have been correlated with increased crash occurrence. This toolbox was developed to assist agencies address crashes at rural curves. The main objective of this toolbox is to summarize the effectiveness of various known curve countermeasures. The toolbox is geared toward rural two-lane curves. The research team identified countermeasures based on its own research, through a survey of the literature, and through discussions with other professionals.

Final Deliverables:

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