Inspired by Internet Rob's Traffic Plus, I made this mod that adds spawn points for some exclusive DLC cars to TBOGT and TLAD.
You'll find more info about the mod in the readme file, but I've added the important points.

Installation
Replace these files in the corresponding path.
For example, TBOGT/pc/data/maps/jersey/nj_03.img/inside the file.
Alternative method
If you have Fusion Fix with Fusion Overloader, place them in an IMG file.
For example, Update/Traffic Plus, for example, /TLAD or TBOG so that they load exclusively in one of the two DLCs/inside the IMG file of your choice.

Bugs
So far I've only seen 2
1st the cars and the police motorcycle from TBOGT were programmed to appear only in multiplayer so if they spawn they will not have the same functions as conventional patrols and / or they will appear being driven by civilians
I recommend moving the police3, police4 and policeb lines from the POPCYCLE_GROUP_ONLY_IN_NATIVE_ZONE area to POPCYCLE_GROUP_COPS in the cargrp.dat file to avoid this
2nd,In the police station near Luis's house, you can rarely see a civilian leaving the station in the police buffalo. This is because they were only programmed to appear in online mode.

Questions
¿Is this compatible with Various Fixes?
Yes, since I used the few WPL files that Various Fixes has as a base for adding lines of code, so I recommend using the aftermentioned for a better experience.
¿Is it compatible with Internet Rob's Traffic Plus?
Yes, this doesn't replace anything in the mod, so you can combine them without any problems.
¿Is it compatible with The Actual Complete Edition?
No, we're talking about GTA IV and its episodes in their base form ¿What do you think?
¿Can I make any modifications or corrections to the mod?
As long as you put me in the credits, I'm fine with that.
the files are in opl format so you can modify them

This is my 1st mod for gta iv so enjoy it :)