About the research
The major task of Phase 2 was to implement the suite of models recommended from Phase 1 at the demonstration sites, and to calibrate those models, if required. Output from those models was then compared with validation data. Validation data, provided by the DOTs, consisted of subsurface temperature data (which was reduced by the research team to compute frost and thaw depths), and in some cases, deflection and/or stiffness data from LWD and FWD tests. The following SLR protocols and models were originally planned for implementation during the 2014-2015 and 2015-2016 winter/spring: 1) Degree day threshold models; 2) Frost & Thaw Depth Prediction Models (freeze thaw index); 3) Frost & Thaw Depth Prediction: Numerical Model.