00815824

Component

https://doi.org/10.3141/1743-15

http://scholar.google.com...Weir&publication_year=2001

Presented are the results of an in-service performance evaluation of four guardrail systems: the G1 cable guardrail, the G2 weak-post W-beam guardrail, and the G4(1S) and G4(1W) strong-post W-beam guardrails. The study was focused particularly on estimating the number of unreported collisions and the true distribution of vehicle occupant injuries. The data were collected in portions of Connecticut, Iowa, and North Carolina during a 24-month data collection effort from 1997 to 1999. The collision performance was measured in terms of collision characteristics, occupant injury, and barrier damage. Unreported collisions were counted in all three areas by periodically inspecting guardrails in a specific control section. Because this type of data collection is both time-consuming and sensitive to methodology and human error, its use is not recommended for future in-service evaluation studies. Instead, the use of rates of injury-producing collisions per million vehicle kilometers traveled past the guardrail or other hardware, which can be determined from data on reported injury collisions, hardware inventory, and traffic volumes, is recommended.

This paper appears in Transportation Research Record No. 1743, Hydrology, Hydraulics, and Water Quality; Roadside Safety Features.

English

p. 111-119

2001

Transportation Research Record

0309072018

Figures (2) ; Photos (6) ; References (12) ; Tables (5)

Cables; Crashes; Data collection; Guardrails; Injuries; Loss and damage; Performance evaluations; Posts

Unreported collisions; W beams

Connecticut; Iowa; North Carolina

Design; Highways; Safety and Human Factors; I81: Accident Statistics; I85: Safety Devices used in Transport Infrastructure

TRIS, TRB, ATRI

Aug 15 2001 12:00AM

• CHARACTERISTICS OF STORM-WATER RUNOFF FROM HIGHWAY CONSTRUCTION SITES IN CALIFORNIA
• COMPLIANCE TESTING OF A BULLNOSE MEDIAN BARRIER SYSTEM: NCHRP REPORT 350
• CONSIDERATION OF STREAM MORPHOLOGY IN CULVERT AND BRIDGE DESIGN
• DEVELOPMENT OF TWO TEST LEVEL 2 BRIDGE RAILINGS AND TRANSITIONS FOR USE ON TRANSVERSE GLUE-LAMINATED BECK BRIDGES
• ENVIRONMENTAL IMPACT OF CONSTRUCTION AND REPAIR MATERIALS ON SURFACE WATER AND GROUNDWATER: DETAILED EVALUATION OF WASTE-AMENDED HIGHWAY MATERIALS
• ENVIRONMENTAL IMPACT OF CONSTRUCTION AND REPAIR MATERIALS ON SURFACE WATER AND GROUNDWATER: SCREENING AND EVALUATION METHODOLOGY
• ENVIRONMENTAL IMPACT OF RUNOFF FROM HIGHWAY CONSTRUCTION AND REPAIR MATERIALS: PROJECT OVERVIEW
• ESTIMATION AND INTERNET-BASED DISSEMINATION OF EXTREME RAINFALL INFORMATION
• IMPROVEMENTS TO THE WEAK-POST W-BEAM GUARDRAIL
• PERFORMANCE OF W-BEAM SPLICES
• RESULTS OF CALIFORNIA DEPARTMENT OF TRANSPORTATION LITTER MANAGEMENT PILOT STUDY
• SELECTION OF ROADSIDE SAFETY BARRIER CONTAINMENT LEVEL ACCORDING TO EUROPEAN UNION STANDARDS
• STEP-POOL MORPHOLOGY IN HIGH-GRADIENT COUNTERSUNK CULVERTS
• THREE-STRAND CABLE MEDIAN BARRIER IN NORTH CAROLINA: IN-SERVICE EVALUATION
• W-BEAM GUARDRAIL ADJACENT TO A SLOPE
• WASHINGTON STATE CABLE MEDIAN BARRIER