Why white lady called white lady?

This is your answer sorry if im wrong

In Hattiesburg, Mississippi, a Woman in White is connected with Burnt Bridge Road's history. In the 1970s, a woman was killed in a car accident while crossing a wooden bridge over a small gully. The resulting fire destroyed the bridge, which was later rebuilt in concrete, and gave the road its new name.

the compromise of 1850 was a package of five separate bills passed by the united states congress in september 1850, which defused a four-year political confrontation between slave and free states on the status of territories acquired during the mexican–american war