More than 250,000 soldiers were wounded in WWII. Some of them could not operate a car using the normal controls. Car makers and shops realized that they had a debt to pay to these veterans. When new cars could be bought after the war, just about every automaker offered hand controls at no extra cost.
At the start of World War II, Japan occupied the rubber plantations in the Dutch East Indies. This cut U.S. manufacturers off from the largest sources of natural rubber to make tires and products for the war effort. The U.S. solved the problem using rationing, recycling and lowering the speed limit to 35 mph. Another