I know where he lives but don’t get your point?
They are saying he wouldn’t be able to tell what the person was drinking from his bedroom window, but if they dont know where he lives or what type of house he lives in how can they say that.
A terraced house that buts up to the footway would pretty much over look the road, or a bungalow so he would be low down enough to see into a car. We also dont know the speed the car was going at.
Basically no one but the op knows but tne fact is that he thinks he saw someone drink driving and seems to have done the right thing.
Seems a bit weird to be calling out the op thats all.