Hmm...
Very interesting movie, I think the interpretation I got out of it was something like this, the road is life, it is dark and you can't see where you are going. You start out moving slowly down it, and then as the younger years pass you have to start trying to just survive alone through work, this is the running. If you stop running, it will become impossible to run anymore, because of the nets, they represent the nets which slowly spring up to catch you if you stop working, homelessness is a main one, it becomes much harder to get work when you don't have work... so you see the house at the end, I think the house is either retirement or death, either way you don't have to run anymore because you are safe. I think that the fact that you saw it in 3rd person view means that maybe you feel very disconnected from yourself, like your out of control of your own actions and you are just being pushed in one direction in life that you can't change.
Very good movie, I enjoyed thinking about it.