Parks' court case was being slowed down in appeals through the Alabama courts on their way to a Federal appeal and the process could have taken years.  Holding together a boycott for that length of time would have been a great strain. In the end, black residents of Montgomery continued the boycott for 381 days. Dozens of public buses stood idle for months, severely damaging the bus transit company's finances, until the city repealed its law requiring segregation on public buses following the US Supreme Court ruling in Browder v. Gayle that it was unconstitutional. Parks was not included as a plaintiff in the Browder decision because the attorney Fred Gray concluded the courts would perceive they were attempting to circumvent her prosecution on her charges working their way through the Alabama state court system. 
Rosa Parks: Well, when I first met him it was before I was arrested. I met him in August of 1955, when he came to be the guest speaker at an NAACP meeting and I was secretary. I was very impressed with his delivery as a speaker and, of course, his genuine friendliness as a person. And his attitude, of course, was to work and do whatever he could in the community for the church to make a difference in the way of life we had at that time. And I was really impressed by his leadership, because he seemed to be a very genuine and very concerned person, and, I thought, a real Christian.