Good. As stated above, TrafficFlow/Fix will cause errors in multiplayer. 

 

The Taxi Bug occurs when you have too many, too high poly models and your computer is too weak to handle it. Remove the car mods. Or, you can try creating a file called "commandline.txt" in your GTA IV folder and add the following contents: 

-renderquality 0 -shadowdensity 0 -texturequality 0 -viewdistance 0 -detailquality 0 -novblank -norestrictions -width 320 -height 240 -safemode -windowed -percentvidmem 100 -minspecaudio -novsync -renderquality 0 -frameLimit 0 -nomemrestrict

It gave me an extremely small box. 

What was in the box? *cough* Sorry, did the game crash when using that commandline? 

Replace the "-width 320 -height 240" in the command line with "-width 800 -height 600".  I don't think anyone can manage to play/test a game like IV with such a small resolution as 320x240

Heaven knows I can't, lol

Edited November 29, 201312 yr by Rocking_Star101

It's actually just part of a test I always ask people to run when GTA IV is glitching/acting out. If the game works on bare minimum settings, I remove some contents from the commandline and proceed to the next step. Process of elimination :)

 

Sidenote:If you want to remove the small box, you'd have to remove "-windowed" too.