The extraordinary cost-benefit-efficiency of LCRT is based on the following five core elements of the concept
- Selective grade separation: Similar to metro lines, LCRT is completely separated from individual car traffic, but similar to trams, it is running mainly on street level. Only in the area of intersections, the tracks are lowered in order to pass under the crossing road.
- Reduced vehicle height: The LCRT vehicles are constructed for minimum height: the clearance of the underpasses is only about 2,5 m instead of usually about 4 m. This is possible through low-floor tram technology, allocation of technical devices at the ends of the vehicle instead of rooftop equipment and catenary-free operation in the underpass area.
- Elevated crossing roads: The underpasses are created not only by lowering the LCRT tracks, but also to some extent by elevating the crossing road. Thus, excavation and filling volume is reduced and technical effort for deep excavation is avoided.
- Cutting minor crossroads: Underpasses are constructed only for crossing arterial and collector roads, leading to one underpass per 250 to 400 m of LCRT line. Minor crossroads are cut at the LCRT line (only turning into or out of the side street allowed).
- Pedestrian level crossings: In addition, protected level crossings (boom barriers) for pedestrians are arranged in order to keep walkways short.