A speed limiter for all vehicles. You can got to an NPC to remove the limit (this has to be done every restart). You can also whitelist cars to never be limited.
Drag t3_speedlimiter into your server's resources folder and add
ensure t3_speedlimiterto your server.cfg.
Set up the config.lua to your liking.
Check and add your desired event/target in the client/npc.lua.
Restart server.