The classification according to performance level at low temperatures was developed by employing the results achieved by the Bending Beam Rheometer BBR tests, which were carried out at the National Highway Administration's laboratory.
La clasificación por grado de desempeño a bajas temperaturas se realizó utilizando los resultados obtenidos del Reómetro de Viga en Flexión BBR, ensayos realizados en el Laboratorio Nacional de Vialidad.