Yes, there are a number of private companies and lobbyists that are advocating and promoting high-speed rail in the United States. Some of the most well-known groups include:

High Speed Rail Alliance: The High Speed Rail Alliance is a non-profit organization that advocates for the development of high-speed rail in the United States. The organization works to educate the public about the benefits of high-speed rail and to lobby government officials for support.
American Public Transportation Association: The American Public Transportation Association is a trade association that represents the interests of public transportation agencies across the United States. The association supports the development of high-speed rail as a way to improve transportation options and reduce traffic congestion.
Rail Passengers Association: The Rail Passengers Association is a non-profit organization that advocates for the interests of rail passengers. The organization supports the development of high-speed rail as a way to provide a more efficient and environmentally friendly form of transportation.
These are just a few of the many groups that are advocating and promoting high-speed rail in the United States. The movement to build high-speed rail is growing, and it is likely that we will see more high-speed rail lines being built in the future.
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