This symbol means tire pressure is low. It doesn't say 'TIRES LOW' because car mfgs want you to take it into the dealership to figure out.pic.twitter.com/SAnE25G4CH
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I've seen many non-technical people have tremendous difficulty with navigating the manual. Again, no incentive for good user experience.
I would hate to see those people behind the wheel....
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.