Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates

to

Document Data
Library
People
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Conceptual development of an impact-attenuation system for intersecting roadways.

Filetype[PDF-41.57 MB]


Select the Download button to view the document
This document is over 5mb in size and cannot be previewed
English
Details You May Also Like

Details:

  • Creators:
  • Corporate Creators:
    Midwest Roadside Safety Facility
  • Corporate Contributors:
    United States. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    TRP-03-312-15
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Nebraska
  • Corporate Publisher:
    Nebraska. Dept. of Roads
  • Abstract:
    Longitudinal barriers are commonly used to shield hazards, including stiff bridge rail ends and slopes. In some locations,

    a secondary roadway intersects the primary roadway within the guardrail’s length-of-need (LON). Some intersections may

    have as little as 15 ft (4.6 m) between the intersection and beginning of the bridge railing, which require short-radius

    guardrail systems. One short-radius guardrail system has passed several crash tests under AASHTO Manual for Assessing

    Safety Hardware (MASH) standards.

    Site conditions provided by the Nebraska Department of Roads were used to determine the constraints for a new safety

    treatment for intersecting roadways and include intersection radii, bridge railing offset distances, and clear zone distances.

    An examination of the site conditions determined that the bridge railing end should be treated as a hazard, as defined in the

    AASHTO Roadside Design Guide. The hazard would begin at the bridge railing end with a width extending to the clear

    zone. Several design concepts were developed to treat these situations with a preference on using existing technologies that

    could be adapted for this hazard scenario.

    Fifteen concepts were brainstormed, with three considered for further analysis and evaluation. These concepts included

    net attenuation/end terminal, inertial barrel array/end terminal, and a bullnose with a secondary energy absorber inside of it.

    All three systems were capable of stopping a vehicle in the space available, but only the net attenuation/end terminal

    concept was considered likely to accommodate the site conditions using a moderate slope behind the system. Four dynamic

    bogie tests and two static tests were performed on potential net attenuators to evaluate their use as energy absorbers in the

    preferred design concept. Recommendations for further development of the net attenuation system were provided.

  • Format:
    PDF
  • Funding:
    SPR-P1(13)
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files
More +

You May Also Like

Checkout today's featured content at rosap.ntl.bts.gov