High-speed rail provider Brightline will use airline retailing software provider Radixx’s passenger service system and other retailing technology under the terms of a new partnership, according to the companies. Brightline, the only private high-speed rail service in the U.S., operates in Florida between Miami, Fort Lauderdale and West Palm Beach. Radixx is Sabre’s technology offering for low-cost carriers. Brightline is its first partner in rail.