The Gold Cadillac — Mildred D. Taylor

As they drove South, 'lois began to see signs:
WHITE ONLY
COLORED NOT ALLOWED

'Lois and Wilma's father has a brand-new gold Cadillac, and 'lois is looking forward to riding in it all the way from Ohio to Mississippi. But in the rural South there are no admiring glances for the shiny new car -- only suspicion and anger for the black man behind the wheel. For the first time in their lives, 'lois and her sister know what it's like to feel scared because of the color of their skin.