BRIEF-Atlantia says H1 Italy traffic down 2.9 pct

ROME, July 1 (Reuters) - Atlantia (ATL.MI):

* Atlantia says traffic on its Italian motorways in the first-half of 2009 was down 2.9 pct

* Traffic on Italian motorways was down 2.3 pct in the first half on a like-for-like basis.