My understanding is that if you have an ABTC and you are coming to USA / Canada for business you are allowed to use the NEXUS lines. Is that correct or is my information wrong?
I did find this which suggests certain Canadian airports have dedicated ABTC lines:
http://www.cbsa-asfc.gc.ca/prog/abtc-cvaa/menu-eng.html
"These foreign ABTC holders are able to enter Canada using designated APEC lines at Canada’s eight major international airports in the following cities".
Reason I ask, was in Vancouver a few weeks ago, couldn't find a dedicated APEC line, tried using the NEXUS line, showed my ABTC and was told this wasn't a valid card.