The OPEC oil embargo was an event where the 12 countries that made up OPEC stopped selling oil to the United States. The embargo sent gas prices through the roof. Between 1973-1974, prices more than quadrupled. In response to the oil crisis, the United States took steps to become increasingly energy independent.
That is was against the law on any public buses and transportation (public) to have segregation. Everyone was equal on buses and other public transportation.