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Table 3 Assessment standard of extreme high temperature climate in cold regions

From: Analysis methodology and assessment indices of vulnerability for asphalt pavement in cold regions

Assessment Index Micro Mild Moderate Severe Extreme
Extreme maximum temperature (°C) < 18 18 ~ 25 25 ~ 32 32 ~ 39 ≥39
High temperature duration (d) < 5 5 ~ 8 8 ~ 11 11 ~ 15 ≥15
Annual average solar radiation (kW/m2) < 1000 1000 ~ 1350 1350 ~ 1700 1700 ~ 2000 ≥2000
Route design (Road horizontal, vertical and horizontal design) Reasonable design and turning radius Proper design and turning radius Large longitudinal slope or large turning radius, the deviation≤10% Large longitudinal slope or large turning radius, the deviation between 10%–20% Poor design or large turning radius, and deviation≥30%