TY - JOUR PY - 2010// TI - Curve collisions: road and collision characteristics and countermeasures JO - Journal of transportation safety and security A1 - Hummer, Joseph E. A1 - Rasdorf, William A1 - Findley, Daniel J. A1 - Zegeer, Charles V. A1 - Sundstrom, Carl A. SP - 203 EP - 220 VL - 2 IS - 3 N2 - Horizontal curves are relatively dangerous portions of roadway networks. Agencies optimizing the use of safety funds should be aware of characteristics of the collisions on those segments. However, few previously published articles attempted to characterize collisions on horizontal curves. This article describes an effort that characterized collisions reported to be on curves in North Carolina using the Highway Safety Information System. More than 51,000 North Carolina (NC) collisions on two-lane road curves were compared to collisions on all two-lane roads and on all roads. In doing so we gained a perspective of how well various curves perform relative to other road areas. We investigated numerous two-lane curve-collision types. Those most overrepresented included: collisions on grades, rural, severe injury or fatal, fixed object (particularly tree, ditch, and embankment), overturn, off-peak hours (particularly during darkness on unlighted roads), weekend, holiday periods, and wet, icy, or snowy pavement. The analysis also revealed that there were few short roadway segments (of 0.1- to 1-mile length) with more than 10 reported curve collisions in 3 years. This article provides recommendations from the literature to treat overrepresented collision types on horizontal curves. Based on the analysis findings, agencies should target countermeasures for the most common and overrepresented collision types.

LA - SN - 1943-9962 UR - http://dx.doi.org/10.1080/19439961003734880 ID - ref1 ER -