I have seen use of different mods (Including passing through lambposts and having 0 traffic) in several top speedruns of races. (eg. San Fierro Hill and Country Endurance). Im not sure using mods are allowed. So im just asking here. (PS I am not asking about cheats. I know they are allowed. I am asking about mods.)

Any mods you think you've seen aren't mods

The linked thread -

@hephaestusboy The ability of passing through lampposts and having no traffic is all reached through the use of glitches. Disabling traffic can be done by tripling bloodbowl and the "pass through any non-solid object" is achieved by gaining control of the RC Baron outside of the mission "Beefy Baron".

In-game cheats are not allowed btw