It was approximately 4 p.m. when the snow began falling in earnest as we drove on Interstate 5 north of Redding, climbing toward Mount Shasta City (elevation 3,600 feet). Within 20 minutes, we were restricted to driving in the right lane, where the trucks kept the snow from sticking; there were 4 inches of snow in the left lane.
We rarely get a chance to test cars in the extreme conditions for which they were designed, but in this case we were happy to be driving the all-new for 2019 Acura RDX SH-AWD A-Spec. We were about to find out if the Super Handling All-Wheel Drive could do what the brochure touted: automatically handle all variations in road surface and traction. Fortunately, we had read about the new features before starting the trip from Los Altos to Oregon, so we knew to switch the selectable traction mode to Snow and switch off the active cruise control.