Thanks for the tip, I followed your advice and for the love of Jobs it worked! A dummy event with two locations and Travel Time did the trick - my Current Location and my downtown office. The "window" of time seems to be about an hour or so before needing to depart - I moved an event about a 30-minute period sooner then later, a 90-minute anticipated departure (depending on traffic) and the notification message disappeared while a 45-65 minute anticipated departure and the notification message reappeared. FWIW, I had cleared out my Frequent Locations before all of this. Also, I got much faster location fixes on wifi FWIW. So, nice find and thanks for relaying this. I will still stick with ETA, which doesn't rely on calendar events - the two of them working together will get me where I need to go, on time - just in time for a trip to and around Seattle! Cheers!