01704721

Component

https://doi.org/10.1177/0361198119844242

The Mechanistic-Empirical Pavement Design Guide addresses climate effects on pavement design in a comprehensive way, which allows for investigating the effect of climate on pavement performance. However, it requires detailed climate inputs, which might not be readily available for most of the state departments of transportation. The AASHTOWare Pavement Mechanistic-Empirical Design (PMED) version 2.3 (v2.3) climate database encompasses 12 weather stations in the state of Tennessee, which does not satisfactorily represent all climatic regions in the state. The terrain in Tennessee varies from flat in the west to mountainous in the east. To evaluate the effectiveness of the updated AASHTOWare PMED v2.3 climate data input, this study analyses the performance of selected pavements in the state of Tennessee using the Modern-Era Retrospective Analysis for Research and Applications (MERRA) and the AASHTOWare PMED v2.3 databases as sources of PMED climate data inputs. A comparative analysis of the two climate data sources is conducted using eight long-term pavement performance (LTPP) sites in the state of Tennessee. The study revealed that MERRA as a climate data source for the state of Tennessee offers better geographic coverage, and therefore provides more precise distress predictions than the AASHTOWare PMED v2.3 climate database.

19-03354

English

pp 279-287

2019-6

Transportation Research Record: Journal of the Transportation Research Board

Digital/other

References (20) ; Tables (6)

Alternatives analysis; Climate change; Databases; Mechanistic-empirical pavement design; Pavement performance; Weather stations

Modern-Era Retrospective Analysis for Research and Applications (MERRA)

Tennessee

Data and Information Technology; Environment; Highways; Pavements

TRIS, TRB, ATRI

Mar 27 2019 3:08PM

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