Citizen scientist tests as of tonight
Opd 100% triggers the break lights.
Verification method. Rear mirrors in the dark can see the red reflecting of things.
What % decel causes it. ANY.
Any amount of lack of accel causes it.
By this I mean that even lightening up on the accel pedal a little deploys the break lights.
Break lights stay in until you are accelerating. This includes zero decel/accel. If you come to a halt the lights stay on until you accel out of it.
So this means coasting will cause them to stay on. Not confirmed yet.
Will test a opd down hill accel on the way home
a friend stood behind my car as I used it - she indicated they did come on.Does anyone know if the brake lights come on when you slow down using one pedal driving? The volvo dealer said they didn't, so it always bothers me when driving, although no one has rear ended me so far.