Need the ability to turn off radar sounds quickly.

I live in an urban environment, I have to cycle through 45 minutes of city to get to a road before I need to care about knowing if cars are behind me. In the city, I assume there is always a car behind me and the beeping every minute if more of an annoyance than a benefit.

I'd like to be able to quickly turn on/off the radar sounds so when I get out of the city I can turn them on quickly. Right now I just leave them off all the time which means looking at the computer more often and not really getting the benefit of the Varia.

I tried doing this with profiles, but sensor settings cannot be specific to a profile.