After over a week of using the Arlo Pro 3 with 2 cameras I have come to the conclusion that the activity detection features simply do not work reliably and that the s/w behind this must be beta level at best. In the front of my house I have a small terrace, a driveway and then a main road. I don't want to capture all the vehicles passing by on the main road and I tried several ways to achieve this none of which worked METHOD 1:- In settings just enabled "person" activity. This still produced notifications and recordings of vehicles driving by, especially at peak traffic time. So many false positives produced with video recordings that I don't want to see. METHOD 2:- Setup activity zones for front of house and driveway but excluding the main road. This stopped all activity notifications entirely and was hence useless.