Answer:
Signs were used to indicate where non-whites could legally walk, talk, drink, rest, or eat. The U.S. Supreme Court upheld the constitutionality of segregation in Plessy v. Ferguson (1897), so long as "separate but equal" facilities were provided, a requirement that was rarely met in practice.
Step-by-step explanation:
The doctrine was overturned in Brown v. Board of Education (1954) unanimously by the Supreme Court under Chief Justice Earl Warren, and in the following years the Warren Court further ruled against racial segregation in several landmark cases including Heart of Atlanta Motel, Inc. v. United States (1964), which helped bring an end to the Jim Crow laws.