After watching the Aerodynamics Experiment #5 video, I was surprised how much turbulence was caused by the hood vent. I decided to see if turning on the radiator fan would break up the turbulence. Shortly after I made the first lane change, I turned on the radiator fan. After making the second lane change, I turned it back off. There doesn't seem to be any noticeable effect. So it would appear that the design of my hood vent needs some refinement.