Basically, at a solid 60FPS, the game never appears completely smooth. Visually, it looks more like a 30FPS game. I've tried changing a number of things - vsync, motion blur, post FX, GPU power settings, max rendered frames, etc. Nothing seems to help, and it's been like this since the game was released several years ago across multiple hardware configurations.
My latest test was to do a 60FPS screen recording with FRAPS and go frame-by-frame to see if anything's out of the ordinary.
For this test, my car was going a solid 68MPH. Yet, objects move ahead more in every other frame. Basically, if you look at a lamp pole up ahead, one frame it appears as if it moved closer by 5 feet while the next frame 2 feet, then 5 feet, then 2 feet, etc.
Does anyone else notice anything similar, and is there any sort of secret hack to fix it? I never found anything so I assume not.