Topic: | Re:how accurate is heathrow webtrak? | |
Posted by: | Claudia Jachtmann | |
Date/Time: | 13/11/07 16:42:00 |
while i do think Richard makes some good points about perception, i also feel at the same time, it is worthwhile to question the methodology of this webtrak system. do they use the real actual data and feed it into a model ? do they edit (or 'smooth out')some of the data before they feed it into webtrak ? or do they bascially use a timetable of supposed traffic ? (and probably other options and combinations of the above are possible) each of different methods used, would actually represent quite differing information i shall go and ask them....... |