Approximately 20 vehicles will be equipped with ISA and data collection capability for the field trials. The field trials began in August 2003 and each lasts for six months. Four successive trials are planned:

The Yorkshire trials precede the Midland ones. The West Yorkshire area will be centred on Leeds and thus will be mainly urban; the Midlands area will be mainly rural and small town.

The trials are designed to be non-intrusive - the vehicles will behave like "normal" cars apart from the ISA feature. Data will be logged automatically and data collection will be remote through a GSM link. The drivers will be able to override the ISA system, but we hope to give support for almost all their regular driving.