Fictional, related to permanent RX/Autocross circuits built in areas of abandoned stone/ gravel quarries in the late 60s. After Rallycross was born 1967 in England, many Autocross circuits (originally gravel only) got additional tarmac/ concrete sections to be also prepared for Rallycross events.
Latest version here: https://www.racedepartment.com/downloads/rallycross-sanderode-with-chicane.59960/
Latest version here: https://www.racedepartment.com/downloads/rallycross-sanderode-with-chicane.59960/