The emergency highway energy conservation act was passed in 1974. under this act, states would only get federal highway funding if they set a speed limit of 55 mph on all four-lane highways. why would the federal government deny funding the states instead of just directly setting the speed limit? the federal government wanted to better allocate money by cutting down on highway funding. state legislatures were not likely to reduce the speed limit to 55 mph on their own. states were thought to have the right to regulate their own intrastate highways. studies by the federal government

Before the Emergency Highway Energy Conservation Act each state could set their own speed limit within the range of 40 mph and 80 mph. However, around 1974, different countries from Europe and the United States supported Israel, which the Arab petroleum exporter countries did not like.

Therefore, the Arab countries stop sending oil to the United States, and this cause a rise in gas prices, which is why the president Nixon set the speed limit of 55 mph because Studies by the federal government showed that was the most efficient speed that consumed the less gas.

rosevelt. 1973. "slaves everywhere"

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.