The empirical method or model described in M-E PDG is specifically referred to as which model?

• A. Pavement response model
• B. Performance prediction model
• C. Mechanistic model
• D. Design threshold model

Answer: (B)

The model referenced in the M-E PDG, known as the empirical method, is specifically characterized as a performance prediction model. This approach is fundamentally used for predicting the long-term performance of pavements based on historical data and observed outcomes, rather than solely on the underlying mechanisms or response forces acting within the pavement structure.

Performance prediction models utilize historical performance data to establish relationships between design inputs (such as material properties, traffic loads, environmental conditions) and resulting pavement performance metrics (such as rutting, cracking, or overall durability). This methodology combines empirical data with a predictive framework to estimate how a pavement will react over time.

By focusing on past performance, these models can effectively guide engineers in making informed decisions regarding pavement design and material selection. In contrast, the other options, while relevant to pavement design, do not accurately describe this specific empirical approach found in the M-E PDG.