To be every where and no where or every thing and nothing; you just have to manipulate time: Essentially in theory a star road would be the ordering of all matter and energy within the space they inhabit that is put in that order some time in the future then ported in and out of time where and when they need them. Think of a plain out in the country; then think of later in the future when that plain is paved over by a road and covered with a city; now imagine if you could take that road and city and move it through time to exactly where and when you need it. Its like that but a good bit different at the same time.