Light beam gives accurate timing. E-Tag (as used in motorway tolling) identifies the car. http://en.wikipedia.org/wiki/E-TAG http://en.wikipedia.org/wiki/DSRC Software matches the potentially less precise E-Tag activation time to the accurate light beam detection and you have your car and time recorded.

Hi Jeff, top stuff. Email sent. Our business day starts about 12 hours before yours on Monday. Any chance of a reply before then, even a very brief one?

Thanks again for your help.

:cheers: