项目官员说，在繁忙的街道，声音工作室，艺术家殖民地和高速公路上缝制，从卡尔弗市到圣莫尼卡的博览会线的延伸即将完成。
The 6.7-mile, $1.5-billion project includes seven bridges and seven stations squeezed into a busy urban setting. The light-rail system will use overhead catenary wiring for power, which required major utility relocations because California law prohibits placing high-voltage systems directly above areas where the public can congregate—such as open-air station platforms.
此外，圣莫尼卡市希望该团队沿着一条狭窄的工业街对齐，以适应面向运输的开发计划。“这是非常具有挑战性的，因为现在我们需要将所有这些公用事业从街道下方搬迁，” Skanska美国加利福尼亚分部的项目主管Brian Freund说，该公司与Steve P. Rados Inc.合资。
The team's design-build contract has increased from $550 million to about $600 million due to "betterments"—requests from municipalities or agencies for changes beyond what contractors bid on at the 30% design stage, says Rick Thorpe, chief executive officer with the Exposition Construction Authority, an agency created by law and tasked with building the line that will be operated by Metro, the public transportation authority in Los Angeles. Requested changes include an aerial station rather than an at-grade station at a major intersection and a $16-million bike path.
该团队仅与公用事业公司的协调工作了将近两年，同时还进行了设计和建设。弗洛德说，在设计竞标的工作中，“我们现在刚刚开始施工了。”索普说，工作始于2012年，但首先要进行的通知有限，因为官员们等待了一组居民提起的诉讼失败和上诉的结果。那三年的过程结束了去年。
The light-rail line follows an abandoned freight rail alignment, requiring crews to sometimes tear down or accommodate existing infrastructure with just inches of tolerance. For example, crews had to squeeze tracks under an existing box structure for the railroad that itself lies directly between the Interstate 10 freeway. "We would have had to shut down two lanes of the I-10 freeway for six to eight months if we had to reconstruct the box," says Thorpe.
弗朗德指出，随着路线越过一条主要的林荫大道，然后在I-405下方，然后在另一座繁忙的街道上，高程变化。索普说，但一直以来，未来火车能够导航的梯度都不能超过6％。在某一时刻，弗朗德（Freund）增加了5.95％。
Part of the alignment travels through an area chock-full of recording and post-production studios. To prevent train vibrations from hampering business, the team utilized in two areas a concrete slab that sits on springs. "We built a concrete bathtub U-section and cast individual elements that range from 30 to 60 ft long that sit on springs," says Freund.
索普说，世博系是使用德国生产并在重工厂使用的第一个北美运输系统。
A test train will begin running in spring, and construction wraps up by fall.
