yeah but, that didn't work out it seems
description in hud file is very confusing
AtRest is the value in meters that will be visible on the 2D map on each side of the player's car when at rest.
SpeedMultiplier is the value multiplied by the player's speed to widen the extent of the 2D map view. Increasing this value will expand the map quicker.
Max is the maximum value in meters that will be shown around each side of the player's car.
<Extent AtRest="180.0" SpeedMultiplier="0.035" Max="300.0" />
these will make the map zoom in and zoom out.
you want to it to extent less at rest, and less extent at max speed and/or a higher max speed.
so it should be lower 1st value, lower 3rd value... second to have it dynamically adapted at speed, like
<Extent AtRest="90" SpeedMultiplier="0.035" Max="250.0" />
then tweak a bit... that should work