freedom ride

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun politics, public policy In the United States during the 1960s, any one of a number of bus trips through parts of the southern U. S., made by groups of civil rights activists demonstrating their opposition to racial prejudice and segregation.
• noun politics, public policy Any one of similar excursions undertaken by protesters in Australia during the 1960s, in opposition to unfair discrimination against Aborigines.