Sugar and coffee had been rationed since 1942, as had tires and gasoline. Measures to conserve the latter two items included the imposition of a national speed limit of 35 miles per hour.
A sticker with the letter A, B, C, T or (rarely) X had to be fixed to the inside of the windshield to indicate ones priority in buying gasoline.
A = Low priority, inessential to the war effort. Only 4 gallons of gas per week were allowed.
B = Essential to the war effort. (Workers in factories, for example.) Up to 8 gallons per week were allowed.C = Doctors, ministers, mail carriers, etc.
T = Truckers. (Gasoline was unlimited.)
X = Members of Congress.