Application Research on Reconstruction and Extension of Expressways Alignment Design
In recent years,a lot of experience in expressway reconstruction and expansion projects has been accumulated.However,due to the particularity of reconstruction and expansion projects,route design faces many complex problems,especially for super-multi-lane expressway reconstruction and expansion.In this paper,taking the Guangzhou North Second Ring Expressway reconstruction and expansion project as an example,the design of route is analyzed in terms of plan,profile and super elevation,including the determination of plan linear indicators,the treatment of insufficient left turn stopping sight distance in the central divider,and the improvement of longitudinal slope and size of vertical curve.The super elevation design treatment methods for super-multi-lane expressway reconstruction and expansion is also proposed.After optimization,the route design scheme improves driving comfort and safety,and can provide reference for route design of related expressway reconstruction and expansion projects.
expressway reconstruction and expansionroute designplan and profile optimizationsight distancesuper elevation design
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