One of the big selling points of Google Now was the ability for it to detect when there was heavy traffic on your commute so you could leave early. Very nice, except I have never seen a work commute card come up. I first noticed this with my Nexus 7, but it didn't matter because I didn't use it as a navigation device. I've got my Work address set in Maps and I've even used now to "navigate to work" but in NEVER adds a work card. However it ALWAYS seems to have a card for going home. I've Googled around and seen a lot of others with the same question, but no one who's ever claimed having it work. What gives?