In order to optimize the game, Rockstar slows the player down in specific areas of the map using zones which have "extra air resistance". This is done through "cull.ipl", which contains all of the cull zones on the map, one of the possible flags for a cull zone is "ExtraAirResistance".
As a result your vehicle get slowed down on these zones of the map, both on acceleration and top speed.
This simple cleo script disables this optimisation as it is no longer necessary on modern hardware. As this version of the mod is a script, it is compatible with total conversion mods that replace "cull.ipl" file such as Proper Fixes.
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