So I after some long pause I decided to play SC4 again. Made clean installation (digital version from Origin) and noticed this:
It can be seen rather clearly I think, transitions between road tiles in certain conditions (intersection, curves, road ends) are glitched. Straight roads are fine but other than that it looks like on the screenshots. Installation is clean (from Origin so it is already patched), without any mods. Terrain on the screenshots is perfectly flat.
Playing on Win7. My PC specs:
GPU: Gainward GeForce GTX 460 GS-GLH
CPU: Intel Core 2 Quad Q6600 2,4 Ghz @2,89 Ghz
RAM: 4GB DDR3
More screenshots:
http://oi60.tinypic.com/ae35vb.jpg
http://oi57.tinypic.com/2jcsppt.jpg
http://oi58.tinypic.com/zss85d.jpg
http://oi62.tinypic.com/1z3cs5l.jpg