Marijuana withdrawal can be more intense than people sometimes realize. While heavy, chronic users may begin to exhibit signs of depression, many users experience insomnia, anxiousness, and irritability.
A New Era. Although diesel locomotives first came to American railroads in the 1920s, their use was confined to switch engines, and later to passenger train locomotives. It wasn't until 1940 that the Electro Motive Division of General Motors (EMD) demonstrated that diesels could practically replace steam locomotives in heavy-duty service.
BHP iron ore did this to test locotrol which is where locomotives are evenly placed along the length of the train. The locotrol setup was 2 locos-166 wagons, 2 locos-168 wagons, 2 locos-168 wagons, 1 loco-180 wagons then the last locomotive on the back. This very long train is controlled by only one driver.