00781503

Component

https://doi.org/10.3141/1690-02

http://scholar.google.com...ohde&publication_year=1999

A new flared W-beam guardrail terminal that incorporates energy-absorbing technology has been developed and successfully crash tested to meet the criteria presented in National Cooperative Highway Research Program (NCHRP) Report 350. The terminal, designated FLEAT-350, incorporates an impact head designed to dissipate impact energy by producing a series of plastic hinges in the W-beam as the impact head is pushed down the guardrail. The energy-absorption mechanism allows the flared terminal to absorb large amounts of kinetic energy before the vehicle is allowed to gate through the system. Most components of the new terminal are similar to those incorporated in the SKT-350 terminal. The terminal system is 11.4 m (37.5 ft) long and incorporates a straight flare with a final end offset of between 0.76 m (2.5 ft) and 1.2 m (4 ft). The terminal uses two breakaway posts in foundation tubes and five rough-cut controlled-release terminal posts of 150 by 200 mm (6 by 8 in.). The energy-absorbing design minimizes problems associated with vehicles that penetrate the terminal and strike slopes, ditches, or other hazards behind the guardrail while still traveling at a high rate of speed. Furthermore the new design has fewer components and is less sensitive to post location and installation details than some other flared systems.

This paper appears in Transportation Research Record No. 1690, Roadside Safety and Other General Design Issues.

English

p. 8-16

1999

Transportation Research Record

0309071208

Figures (4) ; Photos (12) ; References (19)

Breakaway supports; Crash tests; Dissipation; Energy absorption; Guardrail terminals; Posts

NCHRP Report 350

Flared terminals; W beams

Design; Energy; Highways; Research; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure

TRIS, TRB, ATRI

Jan 19 2000 12:00AM

• CHOOSING AN INVENTORY DATA COLLECTION SYSTEM
• CONNECTING MINNESOTA: SUPERHIGHWAYS TO INFORMATION SUPERHIGHWAYS
• CRASHWORTHINESS OF ROADSIDE FEATURES ACROSS VEHICLE PLATFORMS
• DEVELOPMENT OF A FLARED END TERMINAL THAT MEETS CRITERIA OF NCHRP REPORT 350: THE REGENT SYSTEM
• EFFECTS OF COHESIVE MATERIAL PROPERTIES ON LOCAL SCOUR AROUND PIERS
• EFFECTS OF POST AND SOIL STRENGTH ON PERFORMANCE OF MODIFIED ECCENTRIC LOADER BREAKAWAY CABLE TERMINAL
• FACTORS RELATED TO PROBABILITY OF JOINT FLOODING ON PAIRED STREAMS IN OHIO
• HEAVY-GOODS VEHICLE COLLISIONS WITH STEEL ROAD SAFETY BARRIERS: COMBINED INFLUENCES OF POSITION OF CENTER OF MASS AND TIRE-PAVEMENT FRICTION
• HYDRODYNAMIC COUNTERMEASURES FOR LOCAL PIER SCOUR
• INFRASTRUCTURE INVENTORY AND CONDITION ASSESSMENT USING AIRBORNE LASER TERRAIN MAPPING AND DIGITAL PHOTOGRAPHY
• REEXAMINATION OF ROADSIDE ENCROACHMENT DATA (WITH DISCUSSION AND CLOSURE)
• RESOURCE SHARING: WIRELESS TELECOMMUNICATIONS SITE LEASE RATES
• REUSABLE HIGH-MOLECULAR-WEIGHT, HIGH-DENSITY POLYETHYLENE CRASH CUSHIONS FOR WIDE HAZARDS
• ROADSIDE SAFETY ANALYSIS PROGRAM AS A TOOL FOR ECONOMIC EVALUATION OF ROADSIDE SAFETY PROJECTS (WITH DISCUSSION AND CLOSURE)
• SOME EXPERIENCE WITH GEOSPATIAL IMAGERY AND ROUTE OPTIMIZATION
• SURVEYOR: MOBILE HIGHWAY INVENTORY AND MEASUREMENT SYSTEM
• TWO-DIMENSIONAL MODELING OF COLLISION DYNAMICS OF DEFLECTING CONCRETE BARRIERS
• USING LS-DYNA SIMULATION TO SOLVE A DESIGN PROBLEM: BULLNOSE GUARDRAIL EXAMPLE
• VARIATION IN CHARACTERISTICS OF ABRADED ROADWAY PARTICLES AS A FUNCTION OF PARTICLE SIZE: IMPLICATIONS FOR WATER QUALITY AND DRAINAGE
• VIDEOLOG ASSESSMENT OF VEHICLE COLLISION FREQUENCY WITH CONCRETE MEDIAN BARRIERS ON AN URBAN HIGHWAY IN CONNECTICUT