FSX Highway Traffic Speed

Should be there. It's under "AI-Traffic" if I'm not mistaken.

OK. I see it. The confusion for me was the reference to "Ground Vehicles Speed", which I associate with airports.

I believe though that highway road traffic is different and governed by LWcfg.xml (decompiled LWcfg.SPB). That's why I followed David "Opa" Marshall's document "Reducing Vehicle Traffic Speed in FSX". (See Holger's post).

Oh well, editing LWcfg.xml works to me. You can even edit each world region section (A through X) to have its own highway speed setting.

Thanks!