プレキャストコンクリート
Precast concrete transportation products are used in the construction, safety, and site protection of road, airport, and railroad transportation systems. Products include: box culverts, 3-sided culverts, bridge systems, railroad crossings, railroad ties, sound walls/barriers, Jersey barriers, tunnel segments, concrete barriers, TVCBs, central reservation barriers, bollards, and other transportation products. Precast concrete can also be used to make underpasses, surface-passes, and pedestrian subways. Precast concrete is also used for the rail ways of some rubber-tyred metros.