United States Department of Transportation
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners.
As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
i
Instrumentation and Photographic Techniques for Determining Displacement, Velocity Change, and Deceleration of Vehicles with Break-Away Sign Structures
-
1966-09-01
[PDF-2.84 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:Studies by the Texas Transportation Institute aimed at the development of safer roadside sign supports have been conducted since 1963. These studies sponsored by the Texas Highway Department in cooperation with the U. S. Bureau of Public Roads led to the concept of a break-away sign support. By early 1965, the phenomenological behavior of the breakaway concept had become well defined from careful observation of highspeed film records. These records provided qualitative information from full scale crash tests of collisions of automobiles with sign supports. Attempts were made to secure quantitative information concerning displacement, velocity changes and acceleration from the high-speed film data. However, reduction of displacement-time data proved arduous and inconclusive. For this reason, a series of six tests was planned in which an accelerometer was mounted on the crash vehicle to provide a record of the apparent change in acceleration at a point on the frame of the vehicle. The data thus acquired proved to support the data obtained from the highspeed film record. This progress report contains a description of the tests and of the instrumentation. Additionally, its text explains a method for ana lysis of accelerometer data and correlation with high-speed film data. The report also includes information acquired from strain gages and chronology of a collision incident.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
