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Traffic weigh-in-motion (WIM) measurements and validation of the Texas perpetual pavement structural design concept

Authors: Lubinda F. Walubita; Texas A&M University System; Wenting Liu; Tom Scullion; Allex Eduardo Alvarez-Lugo; Universidad del Magdalena; Yenis Margarita López-Esalas; +2 Authors

Traffic weigh-in-motion (WIM) measurements and validation of the Texas perpetual pavement structural design concept

Abstract

Desde hace unos años, en Texas se vienen utilizando estructuras de pavimento perpetuo (PP) en carreteras de tráfico pesado, donde el tráfico esperado a 20 años supera los 30 millones de ejes equivalentes de 80 kN. Con el fin de realizar una validación del diseño de PP y presentar recomendaciones para la estimación de tráficos de diseño, se realizaron y analizaron mediciones obtenidas con estaciones de pesaje de tráfico en movimiento (WIM) ubicadas en dos proyectos de PP. Los resultados encontrados indicaron que las estimaciones del tráfico inicial de diseño de PP fueron comparables con las proyecciones basadas en los datos arrojados por WIM. Sin embargo, se encontró que la subestimación de los módulos dinámicos de las mezclas asfálticas en caliente conllevó a diseños muy conservadores para las estructuras de PP. Adicionalmente, considerando que el uso de estaciones WIM para recolectar datos de tráfico en forma automatizada fue exitoso, en este artículo se destacan las posibles aplicaciones y ventajas (con respecto a sistemas manuales de recolección de datos de tráfico) de usar información de tráfico detallada obtenida mediante el sistema WIM para el análisis futuro de la operación de carreteras y el diseño estructural de pavimentos.

Over the past few years, the State of Texas has used perpetual pavement (PP) structures on its heavily trafficked highways, where the expected 20-year truck-traffic estimate of 80 kN ESALs (equivalent single axle loads) is in excess of 30 million. As a means to validate the Texas PP structural design concept and to make optimal future truck-traffic design recommendations, traffic Weigh-In-Motion (WIM) measurements were conducted and analyzed for two PP projects. The findings indicated that the initial 80 kN ESAL traffic design estimates for PP were comparable to the projections based on the actual measured WIM traffic data. However, underestimation of the hot mix asphalt layer dynamic moduli resulted in conservative designs for the PP structures. In addition, based on the successful use of the automated WIM data stations for traffic data collection, the paper highlights possible applications and advantages (as compared to conventional manual collection of traffic data) of using detailed WIM traffic data information for future analyses of both highway operation and pavement structural design.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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