They promised heaven on earth and distributed fake pictures with giant crops. In 1931, the country was experiencing what while rural wheat farmers were experiencing this. 1931 brought the Great Depression in cities and a record breaking wheat harvest and record high prices in rural areas. What year did tractors come to the fields? Tractors gained popularity in the 1920s as giant armored bugs.
If you cannot see the truck driver's reflection in his or her side mirror, you are in the truck driver's blind spot and they cannot see you. If you stay in those blind spots, you block the trucker's ability to take evasive action to avoid a dangerous situation. A truck's blind spots are called No Zones. A No Zone is the area around the trucks where your car is no longer visible or you are so close that the truck can't stop or maneuver safely. In both cases, when you are in a No Zone you are in much greater danger of getting into a collision.
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