Vancouver’s climate doesn’t just test a road—it punishes it. With over 1,400 mm of rain annually and winter freeze-thaw cycles that sneak into the asphalt matrix, a standard flexible pavement design simply won’t hold up here without real geotechnical adaptation. The city’s position on the Fraser River delta means subgrades often sit on compressible silts and organic layers, so deflection and rutting become budget-killers if ignored. Our team combines laboratory characterization with field verification to build pavement sections that work with the drainage patterns of Metro Vancouver, not against them. When the subgrade gets tricky—say near Richmond’s soft clays—we often pair the pavement analysis with a CBR road investigation to anchor the structural number in site-specific strength data, and sometimes pull in in-situ permeability tests to confirm that the base course won’t saturate during November storms.
A flexible pavement in Vancouver lives or dies by the drainage detail—get the base course permeability wrong and you’re repaving after the first heavy winter.
