The Montgomery bus system isn't any more 'public' than the airlines that fly throughout America. They are private businesses who have contracts with the government. They are still private businesses. Does a contractor become part of the government by accepting a job to build a government building? No. The same thing applies here.you don't get the concept of "open to the public" or "public transportation system", but luckily for the citizens of this nation, the supreme court does and has ruled against racist asswipes such as yourself.
The supreme court is about as helpful as the shit stains you leave on public transportation seats. They are just politicians.