Locate the %PROGRAMDATA%\Test Drive Unlimited folder and delete or rename the radial.cdb file. Note that this file is hidden by default and requires enabling "Show hidden files" in Windows Explorer.
For nearly two decades, Test Drive Unlimited (TDU) has remained a cult classic. Set on the massive, 1:1 scale recreation of O‘ahu, Hawaii, it offered a driving utopia that many modern games still fail to replicate. However, for players returning to this gem—or those diving into the massive “TDU Platinum” mod—a notorious bug has ruined countless high-speed escapes: