| 摘要 |
A warning system in the highway or road immediately adjacent to a pedestrian crossing, school crossing, or railroad grade crossing. The embedded warning system consists of a series of strobe lights powered by a nearby electrical source such as a traffic light, flashing warning light, railroad crossing light and/or gate system or other potential source of electricity. A trough containing the lights is submerged, extending to a depth of 9 to 15 inches below grade. The trough is 8 to 12 feet in length and 5 inches wide. The trough is placed parallel to or perpendicular to the direction of traffic so as to cross the path of oncoming traffic. A series of 4 to 9 strobe lights connected together, having a colored filter of amber or red, is placed along the bottom of the trough. The sides and bottom of the trough are lined with a reflective material made of, for example, highway reflective light beads, a highly polished reflective material, or other reflective material. The top of the trough is sealed with a double layer of plastic material. The sides of the trough are rounded to facilitate placement of the trough in an excavated ditch.
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