00755019

Component

https://doi.org/10.3141/1628-06

http://scholar.google.com...cGee&publication_year=1998

Three prototype Automatic Truck Rollover Warning Systems (ATRWSs) located in Virginia and Maryland, were evaluated over three years to assess how the ATRWS performed and to determine the cost effectiveness. More specifically, the requirements of this evaluation were to (1) evaluate performance and maintenance requirements, (2) evaluate the effectiveness of the ATRWS on speed reduction of detected trucks traveling at or near their rollover speed or maximum safe speed, and (3) evaluate any improvements in safety resulting from the systems. Based on truck classificaiton and speeds as measured by the ATRWS, it was concluded that these systems do affect truck speed reduction. The results showed that for all three ATRWS sites (five lanes total), a speed reduction was observed when the fiber optic sign was activated. The results also showed that this speed reduction was usually higher than the speed reductions of trucks that did not activate the sign. In fact, for the first and second evaluation periods, an overall 29.0 and 21.7% speed reduction from Stations 2 to 3 and Stations 5 to 6 were observed. These percentage speed reductions equate to approximate speed reductions at the Springfield, McLean, and Beltsville ATRWS sites of 4.6 km/h (2.9 mph), 3.9 km/h (2.4 mph), and 2.3 km/h (1.4 mph) for the first evaluation period. The second evaluation period had similar speed reductions.

This paper appears in Transportation Research Record No. 1628, Human Performance, User Information, and Highway Design.

English

p. 41-49

1998

Transportation Research Record

0309064732

Figures (2) ; Photos (1) ; References (5) ; Tables (7)

Cost effectiveness; Crash avoidance systems; Performance evaluations; Prototypes; Rollover crashes; Safety; Speed control; Traffic speed; Truck drivers; Trucks

Speed reduction

Bridges and other structures; Highways; Motor Carriers; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control; I83: Accidents and the Human Factor

TRIS, TRB, ATRI

Oct 9 1998 12:00AM

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