Your attention is GTA: Lost Angelz - a French modification for GTA SA, released back in 2007. The mod was created, as you might guess, on the theme of Los Angeles, so it has a lot of elements of realism.
There are many different big mods for SA, but Lost Angelz is amazing in its scope. Replaced most of the game world, all textures in HD quality.
Waiting for you: - Lots of new road and building textures (using SRT3 mod) - Completely redesigned CJ - New textures for most characters and pedestrians - New interior textures - New weapon - Lots of new cars - Several new radio stations - Replaced loading screens, loading music and interface textures And much more!