Up here in Washington I-90 was recently resurfaced and grooved similar to California's freeways except not as straight. This appears to confuse my Fiesta which has problems maintaining a straight line despite (or maybe because of) the active nibble control. My Solstice handles it just fine but it has a much wider track and much larger tires which might explain it. Have any of our California members noticed anything similar? Right now I am blaming the Hankook tires which I plan to ditch soon but it could also be something as simple as alignment.