FVTM

FVTM is a pack based mod, with which you can add content to the game without any Java knowledge!
All with fairly simple config files. Among other you can create:

vehicles, drive-able vehicles (land and rail, other types wip)
parts, to customize your vehicles
wheels in varying sizes and with varying terrain attributes
materials, generic items which you can use in recipes
consumables, custom food and drinks
blocks, basic blocks, rotated blocks, animated blocks, blocks with functions, blocks with inventories
multi-blocks, customizable machines
clothes, custom wearable armor items

Supported Model Formats:

JSON (only for blocks and items)
OBJ (including blocks and clothes!)
FMF (model format exported from FMT
SMP Toolbox models (uncompiled, no compiling needed!)
and a few more!

Other Cool Features:

legendary road tool (see YouTube video) or bilibili
may work to some degree with Valkyrien Skies on 1.20.1

Content and Pack availability!

Depending on Minecraft version, not all features may be available to the same extent.
Packs are version neutral. You can use FVTM v4 packs on any version FVTM v4 is available on!
But unless a pack for example was specifically updated for 1.21, you may experience things like missing item icons.

Packs

There's a list in there wiki over here.

Discord

https://discord.gg/AkMAzaA

Videos (v4)

How to craft and drive a car || youtube || bilibili
Part / Wheel install and removal in V4 || youtube || bilibili
Note there's no constructor block in V4 Like there was in V3!
Making a vehicle using an OBJ Model || bilibili
more wip

Bilibili Videos

https://www.bilibili.com/video/BV1yB4y1e7jN
https://www.bilibili.com/video/BV1bf4y1b7eo
https://space.bilibili.com/2104691318/video

[FVTM] Fex's Vehicle and Transportation Mod