Drivers beware: There’s a woman driving a stretch of Interstate 90 between Sparta and Tomah — without a license or any training about Wisconsin’s traffic laws.

They traveled 1,720 miles to work long hours on a dairy farm in western Wisconsin, among people who do not speak their language and in a place where their presence is illegal. Part 3 in our Dairyland Diversity project.

A growing number of Wisconsin dairy farmers are relying on immigrants to milk their cows and keep their farms running smoothly. But experts say farmers are often caught in a “don’t ask, don’t tell” web of federal employment regulations, with a strong incentive to know as little as possible about the legal status of their workers.

DODGEVILLE — Rapid increases in the Latino population of Wisconsin’s rural areas are reshaping work, school and social life, but also are raising concerns that Spanish-speaking immigrants are often isolated and mistrusted, experts and residents said at an event aimed at fostering better connections between newcomers and long-time residents.

WATERLOO — Top Wisconsin officials acknowledged Tuesday that Wisconsin dairy farmers increasingly rely upon immigrant workers, including large numbers who may be undocumented — a result of demand for labor and the nation’s porous borders.