01689711

Monograph

http://www.trb.org/Main/Blurbs/178297.aspx

Curved, high-speed roadways are usually superelevated to make the curved roadway easier for vehicles to navigate. However, the angle of these roadways can cause an increase in impact loading that may potentially exceed the capacity of barriers along roadway sections. The report presents guidance on designing, selecting, and installing longitudinal traffic barriers for curved, superelevated roadways for possible incorporation in the American Association of State Highway and Transportation Officials (AASHTO) Roadside Design Guide. The research encompassed extensive vehicle dynamics and finite element analyses of vehicle-barrier impacts on curved, superelevated roadway sections (CSRS). The analyses were conducted for several different vehicle and barrier types, and for a range of roadway curvature and superelevation; shoulder width and angle; roadside slope; and barrier orientation and placement. The results of the computer analyses were validated by crash tests at the FHWA’s Federal Outdoor Impact Laboratory with full-size extended-cab pickup trucks impacting W-beam guardrail on CSRS.

Project 22-29A

English

139p

2019

NCHRP Research Report

9780309480123

Digital/other

Figures; Photos; Tables

Barriers (Roads); Crash tests; Design practices; Finite element method; Highway curves; Highway design; Superelevation; Vehicle dynamics

Design; Highways; Operations and Traffic Management; Safety and Human Factors

TRIS, TRB, ATRI

Dec 26 2018 3:04PM