Google Now supports "Time To Leave" alerts, where a calendar event will have a location (address) tied to it, and will tell you if you have to leave by a certain time to make it, like this:
Cortana doesn't appear to support this. If you add a Calendar event with her using a location from "Places", she just adds it to the calendar, and will only trigger a reminder at the set interval, usually just "15 minutes" before, with no location supported data to tell you you wont make it in time. She also doesn't seem to support the ability to set a preferred method of travel (walk, bike, transit, car).
Cortana doesn't appear to support this. If you add a Calendar event with her using a location from "Places", she just adds it to the calendar, and will only trigger a reminder at the set interval, usually just "15 minutes" before, with no location supported data to tell you you wont make it in time. She also doesn't seem to support the ability to set a preferred method of travel (walk, bike, transit, car).