When paired with a compatible Garmin Varia device¹, the Varia app has the tools you need to ride with confidence. Using the Varia app, you can: - Be alerted right on your phone when approaching vehicles are within 140 meters behind your bicycle. - View color-coded alerts based on surrounding traffic: Green means you’re all clear, yellow means a vehicle is approaching, and red means a vehicle is coming at you quickly and you should take caution. - Receive tone and vibration alerts for approachi