Major components of a study conducted in 1977 and 1978 were: (1) an examination of existing literature on migrant transportation; (2) collection of pertinent empirical data from federal, state, and migrant work camp records; and (3) vehicle counts and observation at 32 selected locations in 11 destination states in the western, midwestern, and eastern migrant streams. At the 32 locations, 5,485 migrant workers were using 1,116 vehicles (51% cars and station wagons, 37% pickup trucks and vans potentially subject to regulation under a strict interpretation of Part 398, and 2% large trucks and buses). A substantial decline in the last 10 years in the number of regulated vehicles was probably due to several factors: government regulations; high cost of insurance premiums on vehicles carrying large numbers of migrating workers; overall decline in the numbers of workers migrating interstate; increased migrant incomes enabling purchase and maintenance of family vehicles. It was concluded that Part 398 has very limited applicability to migrant transportation today, and that even this applicability has been preempted by the laws of California, Texas, and Florida. It was also concluded that Part 398 regulations overlap with the Department of Labor's Farm Labor Contractor Registration Act regulations, which apply to any farm labor contractor who transports migrant laborers. (AN)