In the early 1980s, researchers began to compare the rates of teen traffic fatalities in states with a drinking age of 21 versus those with one of 18. The resulting statistics startled legislators and prompted them to pass the Federal Uniform Drinking Age Act, which withheld federal highway funding from states who kept their drinking age below 21. The purpose of the Federal Uniform Drinking Age Act, when it was written in 1984, was to reduce teen traffic fatalities. Many claim it has achieved its goal. However, a less myopic view of the data, one that takes other variables and long-term trends into account, reveals that its impact on fatalities has been slight -- if not non-existent.