I even created a new save and the problem was on there too, so my save isn't corrupted. This issue happens with all of my saves, not just one. However, even after doing this, the game will still crash every 10 minutes while I am driving around, so there must still be some issue. So, what I did was I went to Verdant Meadows, spawned every car, and got rid of all the cars' mods that crashed the game when I spawned them. So, this has lead me to believe that the cause of the crashes is a corrupted car mod. Also, when I disable traffic, the game doesn't crash. This is when I'm in Los Santos or San Fierro or a place with lots of cars, however when I'm in the Verdant Meadows airfield, the game barely crashes. The problem is, every 10 minutes or so, sometimes it happens right as I start driving, sometimes it takes longer, the game will just crash, and says 'gta_sa.exe has stopped working'.
I have Grand Theft Auto San Andreas Version 1.0 (I got it from Steam as version 3.0 and then downgraded) for Windows PC (I have CLEO 4 installed also, as well as a few cleo scripts (car spawner, cheat menu, improved vehicle functions), and around 50 or 60 car mods).