During the 382 days the boycott lasted, the 40,000 colored people of Montgomery either walked (which most did), shared cars with other colored people or even rode black operated taxis, which costed 0.10$, the same price as a bus ticket would've cost them. The boycott cost bus companies a big loss and leaving many buses idol for months, until the segregation law was lifted.
When the segregation law was lifted several white people fought back with terrorism, like bombing churches and shooting them. Even on early hours of January 30, 1956, Martin Luther King Jr's house was bombed. However this boycott marked a special event in US History.