| 摘要 |
A multiple track railroad system for use with two adjacent sets of paralle l continuous tracks with the tracks having a distance therebetween and each se t of tracks including two continuous rails having a distance therebetween. The railroad system includes an engine for pulling a train that has a set of wheels riding on at least two of the rails, and the engine has a width equal to at least one set of the tracks. T he railroad system also includes at least one rail car connected to and propelled by the engine , wherein the rail car spans and extends beyond the outer rails of both sets of tracks. The railroad system further includes at least four car-trucks supporting the rail car, with two of the car-trucks on each of the sets of tracks, and each car-truck includes at least four wheels, with two wheels each riding on opposing rails of a set of the tracks; and trundle carrier assemblies, one each mounted to a bolster on each of the car-trucks with the upper end o f the carrier assemblies being attached to the rail car to permit the car-trucks to move vertically or horizontally transverse on the tracks relative to the rail car to accommodat e variations in the elevation or distance between the tracks.
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