Most major European railways are currently using DMA instruments to monitor their tracks and their trains. All instruments measuring the track geometry operating in Europe above 250 Km/h are equipped with DMA cameras. DMA has supplied to the Italian Railways the only instrument in the world able to measure the track geometry and the equivalent conicity at speed exceeding 300 Km/h (previous versions of the instrument only measured the track geometry).The technical departments of the railways in Italy, France, Germany, Switzerland rely on DMA instruments to evaluate the running dynamics.DMA has probably the longest and more sound experience in the world in measuring the rail profile with an accuracy good enough to evaluate the wheel-rail interface dynamics, including the equivalent conicity. The equivalent conicity will soon be a mandatory parameter to control for every main line. The interoperability of different train types, especially on high speed lines, demands for a tight control of the track parameters. The track parameters must meet the UIC518 and UIC519 values, as the trains have been certified according to track conditions assessed in these leaflets. DMA has pioneered this work: the DMA software has been used by the UIC519 commission to check the algorithms in the norm.DMA core business is the instrumentation for the railway infrastructure monitoring and train wheels measurement. The R&D investments are fully focused in this area; the high investment level guarantees DMA products are always at the edge of the technology. DMA engineers are skilled in designing electronics, optics, mechanics, software. Every aspect of the system is mastered by internal resources to achieve the best system integration and optimization. Many components DMA is using to create its instruments can be used for: