Hello,
You are not allowed to race other users on standard servers. (Except Tucson, Phoenix, and Södertälje (ProMods) race tracks),
However you can go onto the arcade server and have a race. As rule 2.5 explains below. There are no collisions, but that's just how it is.
You are not allowed to race because of rule §2.5:
Rules marked with an Asterisk (*) do not apply on Arcade servers with 'Arc' or 'Arcade' in their title.
§2.5 - Reckless Driving*
Driving in such a way that is considered unsafe and that puts other players in danger, driving backwards, ignoring traffic lights and road signage, speeding, racing other users (except Tucson, Phoenix, and Södertälje (ProMods) race tracks), ignoring other players and rules. Being outside of the map boundaries, this includes spots inaccessible by normal driving. In the ProMods map it's allowed to drive on unlocked roads or paths. Attempting to use desync lag or quick saves in order to cause damage to another user's vehicle is forbidden. Using the ghost mode feature to go around traffic jams. Even if you have the right-of-way you must make reasonable efforts to avoid all collisions. Even if someone else is in the wrong, you must take actions to avoid a collision.
This means that this rule does not apply on the Arcade server.
You can read all the game rules here.
You can find a full list of all the rules here.
Let me know if this helps you!
Kind Regards,
JamesS014