A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of a Simulated Roadway Weather Information System’s Pavement Temperature Data in Illinois
In 2015 Applied Research Associates, Inc. (ARA) developed a virtual roadway weather information system (vRWIS) that provides roadway maintenance staff with both current and forecasted roadway icing and freeze-thaw conditions. This virtual system uses a computerized climatic model which has evolved over the past 40+ years and can accurately predict the temperature in pavement systems based on atmospheric weather data inputs and pavement materials. Historically, the enhanced integrated climatic model (EICM) has been used for pavement performance research and as a key component in pavement performance modeling and pavement design. The EICM is one of the key modules in the AASHTO Pavement-ME Design software, which is the commercial version of the Mechanistic Empirical Pavement Design Guide (MEPDG). This paper details the level of accuracy at which the default EICM input values for asphalt and concrete pavements predict pavement temperatures compared to the measured values from actual roadway weather information systems (RWIS) in Illinois. First, several vRWIS stations were created to represent the predicted model. The process for creating a vRWIS station consists of collecting pavement structural and material information and then modeling the pavements at these locations with actual atmospheric weather data. Next, the difference between actual and modeled pavement temperatures was evaluated. The analysis determined that the default values in the EICM can accurately predict pavement temperature data. The one-to-one comparison shows an R2 above 0.85 for all selected sites. An additional finding concludes that the predicted model for the vRWIS site is more accurate at colder temperatures. The accuracy at colder temperatures is important for the vRWIS icing and freeze-thaw predictions, allowing winter maintenance crews to effectively determine when and where to use valuable labor and material resources.
Evaluation of a Simulated Roadway Weather Information System’s Pavement Temperature Data in Illinois
In 2015 Applied Research Associates, Inc. (ARA) developed a virtual roadway weather information system (vRWIS) that provides roadway maintenance staff with both current and forecasted roadway icing and freeze-thaw conditions. This virtual system uses a computerized climatic model which has evolved over the past 40+ years and can accurately predict the temperature in pavement systems based on atmospheric weather data inputs and pavement materials. Historically, the enhanced integrated climatic model (EICM) has been used for pavement performance research and as a key component in pavement performance modeling and pavement design. The EICM is one of the key modules in the AASHTO Pavement-ME Design software, which is the commercial version of the Mechanistic Empirical Pavement Design Guide (MEPDG). This paper details the level of accuracy at which the default EICM input values for asphalt and concrete pavements predict pavement temperatures compared to the measured values from actual roadway weather information systems (RWIS) in Illinois. First, several vRWIS stations were created to represent the predicted model. The process for creating a vRWIS station consists of collecting pavement structural and material information and then modeling the pavements at these locations with actual atmospheric weather data. Next, the difference between actual and modeled pavement temperatures was evaluated. The analysis determined that the default values in the EICM can accurately predict pavement temperature data. The one-to-one comparison shows an R2 above 0.85 for all selected sites. An additional finding concludes that the predicted model for the vRWIS site is more accurate at colder temperatures. The accuracy at colder temperatures is important for the vRWIS icing and freeze-thaw predictions, allowing winter maintenance crews to effectively determine when and where to use valuable labor and material resources.
Evaluation of a Simulated Roadway Weather Information System’s Pavement Temperature Data in Illinois
Brink, Wouter (author) / Dwyer, Carmine (author) / Larson, Gregg (author) / Vavrik, William (author)
17th International Conference on Cold Regions Engineering ; 2017 ; Duluth, Minnesota
2017-09-07
Conference paper
Electronic Resource
English
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