Emily Pettis is a senior historian with Mead & Hunt and served as co-principal investigator for the NCHRP
Report 723 project.
Successful completion of the NCHRP
350 Jersey barrier crash test represents an outstanding opportunity for EASI-SET Industries, which licenses Smith-Midland developed products throughout North America and in Europe and South America.
During the past five years (2009-2013), an annual average of 63 fatalities involved collisions with all types of guardrail terminals, including those that pre-date the terminals that meet NCHRP
350 test criteria.
To meet the NCHRP
350 Test Level 3, an attenuator must pass a matrix of tests to demonstrate an ability to withstand an impact of up to 100 km/h (62 mph) using both a 820 kg (1,800 lb) small car and a 2,000 kg (4,500 lb) pick-up truck.
Research conducted under NCHRP
Project 24-34 clearly indicates that of the three primary scour components (pier, contraction, and abutment), the contraction scour equations exhibit, by far, the least amount of reliability in terms of 1) the conditional probability that the contraction scour estimate will be exceeded during the design event, and 2) the unconditional probability that the contraction scour estimate will be exceeded during the life of the bridge.
Over the 50 years that followed, NCHRP
has worked to help USDOT solve critical problems, deliver transportation research over a wide range of issues, and establish standards for how the Nation's highways are designed, built, operated, and maintained.
The REGENT System performs acceptably to the very rigorous NCHRP
350 requirements for end terminals during impacts at speeds as high as 100 km/h (62 mph).
The Triton Barrier with the TL-3 Kit was approved as a NCHRP
350 Test Level 3 Barrier when used with 30 sections or more.
The objective of this new NCHRP
project will be to initiate development of that framework by convening key stakeholders to identify the principal dimensions and initial elements of the framework and actions to be taken to make the framework effective.
Report 704: A Performance-Related Specification for Hot-Mixed Asphalt describes the final version of the tool, called the Quality-Related Specification Software (QRSS).
the leading manufacturer of crash cushions and related highway safety devices, has successfully upgraded its TREND(R) System end treatment, and has introduced the QuadTrend(TM) 350 System that meets NCHRP
350 Test Level 3 recommendations for impacts by vehicles traveling at speeds up to 100 km/h, or 62 mph.
Much of the material for the courses is available from previous NCHRP
projects, such as the NCHRP
Report 610: Communicating the Value of Transportation Research, as well as from other sources.