Possibly Komsomolskaya-koltsevaya, like <a href="http://www.flickr.com/photos/tigerzombie/6158501349/in/set-72157625966278071">another photo</a> by my grandfather?
Taken by my grandfather David C. Cook on a visit to Moscow for a meeting of the International Electrotechnical Commission. Development stamp is Jan, 1970. Scanned from an unlabeled Kodachrome slide numbered 1 in a box labeled "Russia."