Have removed TrafficAircraft.bgl and have all the susual ai traffic in the World/Scenery folder, but still getting lots of Pacifica and World Travel Airlines in KSEA and KPDX - must have another random bgl with trarffic in somewhere - anyone got any ideas? Done a search in my FSX folder on "traf" which gives lots of files, but nothing obviously associated with the Pacific Northwest of the US. Removed all traffic files in my World/Scenery folder and still got the default traffic!

RobschoHmmmm. What is "the usual ai traffic" that you have? Do you have any files outside FSX that you use for addons? I do that for addons and have the library point to them. Search the whole computer, not just FSX. I once found that I had a duplicate of my default traffic file that I don't remember making. One sure way to kill default traffic is to install a WOIA file, or any FS9 file. Not my choice.Bob

It's possible you have an AI traffic BGL in a custom scenery add-on "scenery folder" calling up AI traffic.

Just in case anyone is interested, it is the traffic file in the add-on scenery for Bellingham (KBLI) which was causing the unwanted deafult traffic - doesn't seem to add much at Bellingham itself, but sure as heck fills up Portland and to some extent KSEA!