AUSTIN (AP) – Developers of the Texas racetrack set to host the U.S. Grand Prix in November say they are on schedule.

Construction manager Scott Kahler said Thursday workers have excavated about 85 percent of the Circuit of the Americas track near Austin and they expect to start putting down the first layers of asphalt in April.

Construction of medical and pit facilities is ongoing.

Recent rains caused a few delays, but Kahler says forecasts of dry weather should allow workers to make up for lost time. The project has between 350 and 450 workers on site six days a week.

The U.S. Grand Prix is scheduled for Nov. 18. Track officials say construction must be finished 60 days in advance.

(Copyright 2012 by The Associated Press. All Rights Reserved.)