The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Muhammad Ilyas Yousaf:
TrafficTweats based on a social app: which updates of your routes and traffic conditions, inform other's if you are stuck.With TrafficTweats on your mobile device you can make smarter driving decisions. We update our mobile Traffic app from billions of data points to provide you with accurate, real time, traffic information.