Roblox Size limit Problem

Hi Roblox developers,
I’m developing a game with a huge quantity of vehicles, but I’m experiencing a simple limitation. My game world is becoming too large because of all the vehicles that I’ve included, and Roblox is informing me that the place size is above limits.
The Issue

Too many vehicles are taking up too much space in my place file
Roblox is informing me that the location is too large
Need to have full vehicle functionality while keeping file size minimal

What I’ve Tried
I thought about vehicles being saved in other locations (Place B) and being imported into my main location (Place A), but I’m not sure what is the best way to do this.
Questions

Is it possible to import vehicles between places without placing each vehicle onto the Roblox marketplace to publish individually?

Are there ways to reduce the size of vehicle models without affecting functionality?

Any sample code or techniques that have proved successful on your games would be much appreciated. I must retain all the vehicles as they are an integral part of the game, but need to sort this file size problem.
Thanks in advance!

This is the roblox error message :
Capture d'écran 2025-04-19 191812

bruh show your vehicles so we can see how you can improve them

same with the map

also ik this is old but always show your map and stuff so we can actually see what’s wrong