Hey Milling drum, i'm not sure if thats the paint line you're seeing or just a scuff mark left by the grade ski. The casting you see is an edge of runway light on this particular phase i believe there were 4 or five on each edge of the cut - as you can see these get trimmed to grade. there were also approx 35 centerline lights in a single - single - double pattern that i will go out and pre-trim around to a depth of 6" allowing the electricians to open them up and remove the risers (hopefully dropping them low enough that we can go right over them and not have to jump them).
Hey Digger, i was reffering to an escort vehicle, each escort will usually take 3 or 4 trucks with him/her on each trip. You are right when you say its a busy place, i don't envy the escort vehicle drivers when they have to work during peak hours (now late at night when the airports slow - thats another story)