ARLINGTON, VA -- "The American Trucking Associations’ advance seasonally adjusted (SA) For-Hire Truck Tonnage Index decreased 1.4 percent in June, although May’s reduction was revised from 0.6 percent to just 0.1 percent. May and June marked the first back-to-back contractions since March and April 2009. The latest reduction lowered the SA index from 110.1 (2000=100) in May to 108.5 in June (see chart above)."