yes just set the carts velocity! or set the velocity of the track to a speed u want, so long as you dont ram into a sharp turn. this is really simple.
This is really nice, I decided to try making a cart game for fun and this was perfect, only issue I got was that carts sometimes fall for no reason but I think its just an issue with my tracks :V Cheers 
1 Like
MISTAKE, DO NOT READ.
Thanks, also for everyone using this, the controls are server sided and i forgot to make them client sided so just change the runcontext for the client btw, it is needed for it to work smoother
1 Like
hello, i made a mistake, very sorry but when you made the runcontext clientsided it would break, so here is a patched version of the cart, just drop it into your game after removing the older version. https://create.roblox.com/store/asset/133422595771302/CART-RIDE-SUSPENSION-KIT , please ignore the previous reply by me. @athar_adv @finleymc22
1 Like
update(ish)?:
added more rails to the railpack, and patched cart input delay. here are rails and cart links: (their the same as before but if ur too lazy to back to the original post up there here are the links here) https://create.roblox.com/store/asset/133422595771302/CART-RIDE-SUSPENSION-KIT
and https://create.roblox.com/store/asset/122991774791911/RAILPACK
ATTENTION! make sure u use R6 or ppl can change their mass to change how the carts move.
And updates for making track splits , or Y , so you can go to a different track ?
No, not yet. but eventually it will come out 
perhaps dont make as sharp turns and if you arent already, use the railpack as it gives a track design you may build off of.
1 Like
EVERYONE must read what is below, as it has somethings in particular that is needed for the cart to go up slopes easier.
I have updated the cart model so scroll back and find it and replace your OLD model. And a special thing with this, is it has support for speedboosters, Here is a template for boosters.
https://create.roblox.com/store/asset/78902951006522/speedboost.
I recommend making your own speed boost model as a mere yellow part isnt really that appealing, AND it is very buggy so I recommend using guide rails into a booster to avoid higher chances of falling off. Have a good afternoon, or morning, or whatever, now have fun! (Your dream has come true @finleymc22!) (yes you can do loops with it but dont trust roblox physics)
A Small Announcement: Soon I will be adding premade track pieces. (Like in old cart ride games but in my cart ride format.)
I DO NOT RECOMMEND USING THESE PREMADE TRACKS AS THEY ARE LIMITING TO WHAT YOU CAN MAKE unless you are having a hard time making your own rails.
amazing! thank you!
this cart model you’ve made is definitely the best one on roblox
1 Like
Added small patch to speedboosts so if you ever have a speed boost on a moving platform (thats controlled by physics of course), the carts velocity after being boosted will be the speedboost in the boosters direction, plus the boosters AssemblyLinearVelocity so the cart wont jerk unexpectedly, you can find the updated speedboost model in a previous reply.
(You dont need to patch the cart in the previous reply, its an update only to boosters)
Also make sure if your making the cart go REALLY FAST, you should turn off StreamingEnabled or configure its settings to have a bigger loading zone
I changed my mind, Trailers are going to mess with the boosters.
DELETED POST:
Here is a little snack of info of whats next for this amazing project:
Eventually there will be a trailering system where like you can have a trailer on your cart like on Cart Ride Around Nothing, and Cart Ride Delivery Service (you should play them sometime! They are good games!)
IMPORTANT!
If the Cart derails on boosters, set the speedboost value in the booster script to 100 instead of 120.
to have faster acceleration, you can double (or whatever multiplier) the wheels torque, however this may make it unstable, i recommend keeping it at 25 (normal), or 50 (double)
1 Like
BIG UPDATE: added the ability to change gravity direction here is a standalone cart that does this https://create.roblox.com/store/asset/127257060860698/Cart-w-antigravity-template, it also updated the test place too, if you dont need to change gravity direction, then delete GravityDir and the gravity script. inspired by cart ride delivery services stage in its galaxy world called wacky gravity
Here is a gravity changer template I forgot to add in the initial draft, sorry!
https://create.roblox.com/store/asset/110876396302324/gravitychanger
Important note, must read.
Please use a StarterCharacter template using the normal default scale, since packages can mess with your characters Mass, Here is one you could use for example: https://create.roblox.com/store/asset/132334092502177/StarterCharacter. Make sure that you do not change the size and any accessories or details you add to the character are set to be massless, or else certain avatars can give certain advantages and or disadvantages,