The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From SK8 Wireless Technologies:
Traffic Montreal will shorten your commuting time! Concerned about getting stuck in rush hour? Use Traffic Montreal to check the status of traffic along your commute before you head out. Traffic Montreal displays the traffic cameras provided by Transports Quebec. Simply browse the list of intersections, or alternatively open the handy map displaying all the traffic cameras in the Montreal area, and choose the camera to view. You can refresh the camera display as well as add specific cameras to you favorites list. Choose the least busy route home and never get stuck in traffic again! Cameras are provided by Transports Quebec and therefore availability is beyond our control. Works on the iPhone and iTouch. An internet connection is required. Please report bugs and suggestions directly to SK8-Wireless@rogers.com