iOS 8 Calendar : Time to leave / travel time alert does not show

iPhone User Guide: For iOS 8.1 Software

Calendar at a glance: pg. 78

"Add an event. Tap +, then fill in the event details. If you add a location and choose Alert > Time to leave, Calendar reminds you of the event based on the current travel time to get there."

On my phone, "Time to leave" is not available as an event alert option. I'm using the iCloud calendar, not Google, not Exchange. I've entered various addresses (selecting the suggested address) and my event even shows a Maps preview of the destination. Still, I do not see a "Time to leave" alert option.

According to the user guide quote above, "Time to leave" should be visible.

I see that there is a Travel Time detail for the event and I can specify a starting point where I think I'll be for my future event, but the drawback is that this method only works statically.

Thanks,

iPhone 6 running iOS 8.1.2