You know that what you eat affects your sleep, but did you know that the reverse is also true? Studies now show that people who are sleep deprived tend to eat more fat-rich foods, simple carbohydrates, and fewer vegetables, possibly because sleep loss alters chemical signals connected to metabolism and hunger.
Figure 6. Figure 6 is a bar graph showing the number of main-track train derailments and the number of main-track train collisions per year from 2001 to 2010. In 2001 there were 7 main-track train collisions and 132 main-track train derailments.
Some train wrecks occur when drivers exceed the posted speed limit (19 derailments last year), but, more often, the cars go off the rails because the brakes weren't used correctly. An object that happens to be sitting on the track isn't likely to derail an oncoming train. A freight train can typically throw a 4,000-pound car out of its way without getting off trackâalthough in 2005 an SUV left on a commuter track caused a fatal derailment in California.