This is a script I recently made for cruise controling, press F6 to toggle the cruiser on/off. I have only limitted the max speed, if you want to modify it and add an acceleration or transmitter limiter your choice.
See you around.
EDIT: Removed the broken Mediafire link and added a dropbox link
EDIT2: Added 1 more constraint, you need to be the driver to be able to use F6 (Not tested tho, no one tested it with me)
The link does not work, mediafire is showing it as dangerous,
i recommend reuploading to a different site 
Fixed the broken link, try now.
Anyway you can add controller support? Also I love it!
Doesn’t work with police vehicles?
It doesnt work on custom cars, why is this? Or maybe its just police cars, I dont have custom civilian cars on my server.
Come to think of it yeah my police cars are add-ons so maybe that’s it.
Where do i install it to?
Not supposed to promote your server in releases. I think that’s something for #server-development:server-bazaar
Removed
Thanks. Not my rules just community guidelines. 
No lol, I removed it from his post. I have the ability to do that.