Table 3-2  Status of Transportation Sector Productivity Data,,
Data type,Source,Availability
"Productivity data for the entire transportation sector, both for-hire and in-house components and for all modes",,Not available  
,,
North American Industry Classification System (NAICS)-based labor productivity,Bureau of Labor Statistics (BLS),"Available for air transportation, line-haul railroads, general freight trucking (long-distance); none for water transportation or transit"
,,
Standard Industrial Classification (SIC)-based labor productivity,BLS,"Available for local trucking, bus carriers, and petroleum pipelines for 1947–2000; BLS not planning on producing data beyond 2000"
,,
NAICS-based multifactor productivity,BLS,Available for air transportation for 1972–2001
,,
SIC-based multifactor productivity,BLS,Available for railroads for 1972–1999
Multifactor productivity data for other modes,BTS,Trucking data under development