Safety improvements on horizontal curves for two-lane rural roads : informational guide Zegeer, C et al
Publication details: Chapel Hill, NC : The University of North Carolina. Highway Safety Research Center, 1991Description: 104 sSubject(s): Online resources: Abstract: This guide provides guidance for the design of horizontal curves on new highway sections and for the reconstruction and upgrading of existing curves on two - lane rural roads . Information is also provided in this guide for computing the expected benefits and costs for a variety of curve improvements , such as curve flattening , roadway widening , providing spiral transitions to curves , improving superelevation , sideslope flattening , and other roadside improvements . Thus , this guide should be useful to highway designers and safety officials responsible for the design of 3R projects , improvements to high - hazard locations , and highway reconstruction as it relates to horizontal curves .This guide provides guidance for the design of horizontal curves on new highway sections and for the reconstruction and upgrading of existing curves on two - lane rural roads . Information is also provided in this guide for computing the expected benefits and costs for a variety of curve improvements , such as curve flattening , roadway widening , providing spiral transitions to curves , improving superelevation , sideslope flattening , and other roadside improvements . Thus , this guide should be useful to highway designers and safety officials responsible for the design of 3R projects , improvements to high - hazard locations , and highway reconstruction as it relates to horizontal curves .