This location is based on driver postcode data included in the vehicle records for each crash in STATS19 returns. MAST assumes that the driver resides in the local authority area which contains the postcode centre point. In cases where a full valid postcode has not been included in a STATS19 return, the place of residence will be listed as unknown.
The Driver Home Small Area dimension operates on a similar principle, but categorises results by the Small Area in which the driver resides. However, this dimension cannot be used in MAST indexed reports.