The Circuit of the Americas track in Austin is making good progress with "marrying the track" taking place.
The US GP will return to the Formula One calender this year with a race in Texas in November.
Construction of the track has had it's hiccups, with a contractual dispute bringing a halt to work over the winter. However, matters appear to be well on schedule now.
"Circuit of The Americas has reached another paving milestone!," read a statement on the circuit's website.
"Today the the crew is laying final piece of base course and completing the entire first layer of pavement around the track. This process is referred to as "marrying the track" and is taking place from Turn 20, through the starting grid and up the hill to Turn 1.
"Unlike building a traditional sports complex like a stadium or ballpark the major portion of construction for Circuit of The Americas is building the "track" itself.
"About ten feet of Central Texas clay was excavated the entire length of the track. A black poly material 30 millimeters in thickness was then placed along the length of the excavated portion. This material acts as an envelope for layers of select fill to be placed so that it remains exactly in place."