section 23 transportation this presents data on civil air both passenger and cargo water including inland waterways oceanborne commerce the merchant marine vessel tonnages also statistics revenues freight traffic volume employment in various revenue producing modes of transpor tation industry motor vehicles trains pipelines are pre sented highway mileage finances vehicle travel accidents regis trations characteristics public transit railroads principal sources trans portation annual national issued by us bureau report port association america washington dc waterborne com merce united states corps engineers department army addition census its commodity survey part transporta tion taken every 5 years through 1997 for ending 2 7 provides type weight value commodities shipped manufacturing establishments means origin des
