NEW YORK (Reuters) - The U.S. Transportation Department
Thursday launched a new way to measure the strength of the economy by using freight
and passenger service volumes.
U.S. Treasury Secretary Norman Mineta
was due to unveil the Transportation Services Index at the New York Stock Exchange
after having rung the opening bell.
The monthly index, which will have
about a two-month lag, will be launched in March and hold data going back to 1990.
"It is the first index to measure the overall volume of transportation
in the U.S. economy" said John Wells, chief economist at the Bureau of Transportation
Statistics.
"In particular our research index tends to lead changes
in the overall economy before a turn down" Wells told Reuters.
"But
at the end of a recession it tends not to be a leading indicator. It rises at
the same time as the overall economy rises."
The index, as well as measuring
passenger and freight volumes by road and rail, will measure inland waterway traffic
and pipeline volumes.
Wells said research showed that 61 percent of
the index was made up of freight in 2002, down from 72 percent in 1980.
According to the Transportation Department, there are 3.9 million miles of public
roads and 2 million miles of oil and natural gas pipelines. There are also 120,000
miles of major railroads, more than 25,000 miles of commercially navigable waterways
and more than 5,000 public-use airports.