ALTPRO has organized a meeting of the CENELEC working group WGA4-02 in Zagreb on 7.2.2016. Working group is responsible for the maintaining of existing and creation of the next generation of standard series for Railway applications with focus on Compatibility between rolling stock and train detection systems. 18 working group experts from Austria, Belgium, Croatia, Czech Republic, Denmark, France, Germany, Great Britain, Italy, Netherlands, Poland, Sweden, and Switzerland attended the successful meeting.