I know this topic is old but i made a simplified explanation
https://forums.gta5-mods.com/topic/43030/possible-fix-for-layout_low_rhd-not-working-right-hand-drive-addon-cars-buggy

Disclaimer: this post IS a possible fix NOT a query/request for a fix.

Explanation
For the past few days I have been cramming my GTA 5 with addon car mods, using packed up DLC rpfs; I recently ran into a problem where i tried adding a lot of DLCs files and when I launched the game I could no longer enter cars that used the layout "LAYOUT_LOW_RHD"

Long story short, adding more and more files with a particular order of loading can cause files to act buggy or overwrite themselves(not actual fact but just an anology)

FIX
To fix this bug you will need to use a dlc that has a proper working vehiclelayouts.meta with the Right Hand Drive layout settings.

Once you decide which addon file to use, launch OPENIV, navigate to that dlc and open it, then open/edit the file thats labelled setup2.xml and look for the line that reads <order value="#" /> (a number will be where i place the #, it will vary)

you may see something like this <order value="9" />

change the number to a higher one such as 60 or 61.

If this doesn't work for you, then i aint got nothing else

A mod that automates snow, Like GTA Online

Depending on settings in a .ini file

1. We can change it to real-time so it matches the date on the calendar
2. A certain amount of time is calculated in the game to change the weather to snow
3. Or if we sleep/save the game a particular amount of times per session the season would change (similar to Sons of the forest)

Snow would include
The snow falling can change from a blizzard to calm snow and the snow texture on all objects (Just like Online)

Already made

https://www.gta5-mods.com/scripts/blinker-lua

A properly working persistence mod that

1. Can save addon cars
2. Save car modifications to include vehicle_extras and liveries
3. Auto updates the location of cars once exited or modified/tuned
4. Possibility to save up to at least 50 cars
5. Possibility to sell cars and or remove cars from save slots
6. Toggleable car blip for saved cars which can be disabled in .ini to prevent blips from disappearing
7. Cars despawn and load up within a certain radius to prevent lagging or performance issues
8. Controller support (preferably mod relies on Ifuit app/call to use)
9. Supports flatbed tow truck script trucks
10. Saves a wide variety of vehicles big or small, boats, planes, bicycles and trailers(if possible)

No other car persistence mod works properly and others crash the game after 15-20 minutes of gameplay

This was the best one so far but will not work with current script hook version, and it was very lacking
https://www.gta5-mods.com/scripts/vehicleskeeperv

This was very promising but overdid what it was intended for, undeveloped/buggy, prone to crash and abandoned by author
https://www.gta5-mods.com/scripts/advanced-persistence-vehicle-management

The idea of this one is near perfection, however, it doesn't save mod/tuned parts on vehicles nor extras or liveries, also script fails on saving certain vehicles, it also doesn't save flatbed tow truck scripted vehicles
https://www.gta5-mods.com/scripts/save-my-car

(Image of me using a mixture of two persistence mods)
https://www.gta5-mods.com/scripts/i-m-not-mental-s-persistance-mod
This one started to fail recently as saved cars get deleted randomly

&

https://www.gta5-mods.com/scripts/save-my-car
Tried saving a flatbed tow truck and the model got swapped( the truck displayed in the image is not the one I saved)

@jerome74 i first found out it was fixed when i saw a 20 car pile up at a traffic light, first in a long while now

@JohnFromGWN believe it or not, i found my problem..

Drum roll please,

My save game file was corrupted

Made one more save in franklins house and after relaunching the game it just kept on crashing after a few seconds.

I got fed up and deleted my save game and redownloaded a fresh one, voila, back to normal

i found 2 heapadjuster.asi files in the root folder not sure if this is the issue yet tho, i removed some other folders and the game seems a bit more stable

@JohnFromGWN forgot to hit reply

the scripts are out, the car addons are out, the gameconfig is out

the heapadjuster now,
i've increased this alot, do you think this may have a negative effect?