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Nuevo índice de consistencia basado en la velocidad de operación inercial

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Nuevo índice de consistencia basado en la velocidad de operación inercial

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García García, A.; Llopis Castelló, D.; Camacho Torregrosa, FJ.; Pérez Zuriaga, AM. (2013). Nuevo índice de consistencia basado en la velocidad de operación inercial. Rutas. 154:19-27. http://hdl.handle.net/10251/58640

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Title: Nuevo índice de consistencia basado en la velocidad de operación inercial
Secondary Title: Road crashes occurrence depends on several factors: human factor, infrastructure factor and vehicle factor. The infrastructure factor is one of the most important. The influence of this factor on road safety can be analyzed by means of road design consistency. It refers to the conformance of highway geometry to drivers’ expectations.A new consistency model for evaluating the performance of tangent-to-curve transitions at two-lane rural roads is presented. It is based on the Inertial Consistency Index (ICI), defined for each transition. It is calculated at the beginning point of the curve, as the difference bet-ween the average operating speed of the previous 1 km road segment (inertial operating speed) and the opera-ting speed at this point.88 road segments, which included 1,686 tangent-to-curve transitions, were studied in order to calibrate ICI and its thresholds. The relationship between those results and the crash rate associated to each transition has been analyzed. It has been pointed out that the higher the ICI is, the higher the crash rate is, thus increasing the proba-bility of accidents to take place. Similar results were obtained from the study of the relationship between ICI and the weighted average crash rate of the corresponding group of transitions.A graphical and statistical analysis established that road consistency may be considered good when ICI is lower than 10 km/h; poor when ICI is higher than 20 km/h; and fair otherwise.A validation process has been carried out considering 20 road segments. The obtained ICI values were highly correlated to the number of crashes occurred at the analyzed transitions. Hence, the Inertial Consistency Index (ICI) and its consistency thresholds resulted in a new approach for consistency evaluation
Author:
UPV Unit: Universitat Politècnica de València. Departamento de Ingeniería e Infraestructura de los Transportes - Departament d'Enginyeria i Infraestructura dels Transports
Universitat Politècnica de València. Instituto del Transporte y Territorio - Institut del Transport i Territori
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Abstract:
[EN] Road crashes occurrence depends on several factors: human factor, infrastructure factor and vehicle factor. The infrastructure factor is one of the most important. The influence of this factor on road safety can be ...[+]


[ES] Los accidentes de tráfico se producen por la concurrencia de diferentes factores (factor humano, infraestructura y vehículo), siendo la infraestructura uno de los más importantes. La afección de dicho factor sobre la ...[+]
Subjects: Highway , Geometric design , Consistency , Road safety , Operating speed , Inertial operating speed , Carretera , Diseño geométrico , Consistencia , Seguridad vial , Velocidad de operación , Inercia
Copyrigths: Cerrado
Source:
Rutas. (issn: 1130-7102 )
Publisher:
Asociación Técnica de Carreteras
Publisher version: http://www.atc-piarc.com/rutas.php
Type: Artículo

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