Roads

THe layout of all the pyramids,,and connecting roads is curious... THere is road(like the one where Prometheus landed)..that goes directly to the entrance of the Pyramid in our story,,passed a wall surrounding the structure, THer is not a lot of room between the ship and the Bee Hive dome,,seemingkly a perfect place to hid a Juggernaut underground, There is also a road dirctly behind each pyramid that connectd directly to the next pyramid,,and then the next one, I presume our ship landed at the first one in line. What I did not notice was a parrallel road to the left of Ptometheus,,that bypasses all of the Bee Hives,,which I suspect was a an access road to get from the forst to the last Pyramidmmin the event that all of the Juggernauts were activated,,the roads were far enough out of the way for others at get around the arising Engineer ships. The scene generated several questions,,mostly abut the Engineers,, *All the Bee Hives Looked the same,,No Headquarters, *No Landing field,, Surely there would have been some off world ships that eventually..no matter how many centuries (in our time references)landings * No other buildings of any type are scene,,, None in this area,,curious,. What or why were there roads at all? No cars or trucks,,or any kind of ground conveyance was seen that the Engineers might have used,,even in the tunnels.