Monthly data, seasonally adjusted (millions of dollars)
|Total||Air transportation||Land transportationa||Water transportation|
a Land transportation construction is primarily related to mass transit systems.
NOTES: Expenditure refers to the value of work done on construction projects underway during a given period of time, regardless of when work on each individual project was started or when payment was made to the contractors. Public expenditures on transportation construction are a measure of growth in system capacity. Construction includes new buildings, infrastructure, renovations, site preparation, and other materials and structures involved in construction. Maintenance of existing facilities and structures is not included. Construction expenditures on completely new routes and terminals are direct additions to system capacity. Construction expenditures (including renovations, expansions, conversions, etc.) on existing transportation infrastructure may improve maintenance and system management, safety, and other attributes that increase capacity.
Seasonally adjusted annual rate for an individual month is an estimate of what the annual total would be if non-seasonal conditions were the same all year.
Details may not add to totals due to rounding.
SOURCE: U.S. Department of Commerce, U.S. Census Bureau, Construction Spending, State & local, available at http://www.census.gov/const/www/c30index.html as of December 2010.