Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Inexpensive Accident Countermeasures at Narrow Bridges
The report describes the activities and results of the operational based effectiveness evaluation. The evaluation was performed by conducting before and after analyses of vehicle speed and lateral placement at 18 narrow bridge approach sites. The low-cost countermeasures that were evaluated consisted of combinations of advance warning signs, pavement markings, raised pavement markers, roadside delineators, type 3 object markers and adhesive delineators. The operational data were obtained by using the Federal Highway Administration's Traffic Evaluator System. With the exception of one analysis category, the operational based effectiveness evaluation did not reveal significant difference, at the 10 percent level, between the before and after time period. The one exception was that the low-cost countermeasures significantly reduced speed variation when all vehicle types and time periods were analyzed together. For this analysis category, therefore, the low-cost countermeasures resulted in more uniform driving behavior.
Inexpensive Accident Countermeasures at Narrow Bridges
The report describes the activities and results of the operational based effectiveness evaluation. The evaluation was performed by conducting before and after analyses of vehicle speed and lateral placement at 18 narrow bridge approach sites. The low-cost countermeasures that were evaluated consisted of combinations of advance warning signs, pavement markings, raised pavement markers, roadside delineators, type 3 object markers and adhesive delineators. The operational data were obtained by using the Federal Highway Administration's Traffic Evaluator System. With the exception of one analysis category, the operational based effectiveness evaluation did not reveal significant difference, at the 10 percent level, between the before and after time period. The one exception was that the low-cost countermeasures significantly reduced speed variation when all vehicle types and time periods were analyzed together. For this analysis category, therefore, the low-cost countermeasures resulted in more uniform driving behavior.
Inexpensive Accident Countermeasures at Narrow Bridges
B. L. Bowman (Autor:in)
1987
96 pages
Report
Keine Angabe
Englisch
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