Yes, as Robot said, but you will need winrar or another zip extracting program (winzip. 7zip). All add-on tracks go into your locations
folder in TeamData
It's a good idea to make a new folder on the desktop, and unzip the file in there, just to check that it is in the correct folder with the track name.
You will soon get used to how all the add-on tracks and cars are installed.
As CX650 said, it's always a good idea to read
the read me
for any special instructions, like deleting old versions and so on.