Publicado

2018-04-01

Highway designs: effects of heavy vehicles stability

Diseño de autopistas: efectos de la estabilidad de vehículos pesados

Palabras clave:

highway design, static rollover threshold (SRT), heavy vehicle, road safety, rollover, slide out (en)
diseño de vías, umbral de vuelco estático (SRT), vehículos pesados, seguridad vial, vuelco, salida de la vía (es)

Autores/as

From the perspective of heavy vehicles stability, some criteria of stability should be adhered to highway designs. In particular, the relationship between minimum radius, superelevation, slope angle, side friction, and design speed should be re-evaluated. In this regard, the static rollover threshold (SRT) is one of the most important factors used to define the stability of vehicles. This factor is highly dependent on the maximum lateral acceleration (ay) of a vehicle until it reaches the rollover threshold. This acceleration in turn is dependent on the vehicle speed and the radius of curvature. Taking into account the stability of vehicles, in this study the highways design is evaluated and compared with the classic design criterion. This study also suggests that in order to ensure driving safety, the State Highway Agencies should make a reevaluation of existing speed limits and the design of highway curves.
Desde la perspectiva de estabilidad de los vehículos pesados, se deben adherir algunos criterios de estabilidad al diseño de carreteras. En particular, la relación entre el radio mínimo, el peralte, el ángulo de pendiente longitudinal, la fricción lateral y la velocidad de diseño deberían reevaluarse. En este sentido, el umbral de vuelco estático (SRT) es uno de los factores más importantes utilizados para definir la estabilidad de los vehículos. Este factor depende en gran medida de la aceleración lateral máxima (ay) cuando un vehículo alcanza el umbral de vuelco, esta aceleración a su vez depende de la velocidad del vehículo y del radio de curvatura. Teniendo en cuenta la estabilidad de los vehículos, en este estudio el diseño de carreteras se evalúa y se compara con el criterio de diseño clásico de vías. Este estudio también sugiere que para garantizar la seguridad de conducción, las agencias de carreteras estatales deberían hacer una revaluación de los límites de velocidad existentes y el diseño de curvas de carretera.

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