The deceleration of private cars and heavy vehicles was measured after end-on entry at high speeds into a long bed of lightweight aggregate material (Lytag). Two other beds of Lytag were used to study side-entry into arrester beds of differing widths, one wide enough to accept the sheels on both sides of a vehicle (dual-track bed) and the other wide enough to accept only the wheels on one side of a vehicle (single-track bed). With end-on entry all the vehicles were stopped satisfactorily from 72 km/h without the use of brakes at a deceleration value of about 0.5 g. In the case of the dual-track bed a 300 mm high kerb was required along the far side to ensure that the vehicles were contained within it for typical side-entry angles of 5 degree - 10 degree to the length of the bed. In the case of the single-track bed a 300 mm high kerb surmounted by a hydraulic crash barrier was found to be necessary. This arrangement decelerated vehicles at about 0.3 g on level ground corresponding to about 0.2 g on a down hill gradient of 1 in 10. (Author)
Tests to Determine the Design of Roadside Soft Arrester Beds
1971
24 pages
Report
Keine Angabe
Englisch
Tests to determine the design of roadside soft arrester beds
TIBKAT | 1971
|Analysis: Roadside emissions tests slammed
Online Contents | 1999