Balfour Beatty Rail Projects has developed a new design of fully-supported embedded rail slab track that does not rely on being supported by either sleepers or base plates. It is called Balfour Beatty Embedded Slab Track (BBEST). Operating trials with a 120m-long dual-gauge section were conducted at Medina del Campo, Spain, in 2002. A second section, 160m long, has been in service since October 2003 at Crewe on the line to Kidsgrove and Stoke-on-Trent in Britain. This line was recently electrified to provide a diversionary route off the West Coast Main Line.
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机译：Balfour Beatty Rail Projects开发了一种完全支持嵌入式轨道平板轨道的新设计，该轨道不依赖于轨枕或底板的支撑。它被称为Balfour Beatty嵌入式平板轨道（BBEST）。 2002年在西班牙的Medina del Campo进行了120m长双轨距断面的运行试验。自2003年10月以来，第二个160m长的断面一直在克鲁郡投入服务，该线路一直通向Kidsgrove和Strent-on-Trent在英国。这条线最近被电气化，以提供从西海岸干线出发的改道路线。
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