Answer:
I hold two meanings. With one I may be broken with the other I hold on.
I have two bodies joined together as one. When standing still I run and run.
When you take away the whole from me there is always some left.
A trail, a union, together tied. Come across me and you will find you cannot change the course I'm on. Without me you cannot travel on. What am I?
I run around the city but I never move.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?