Companylọ ọrụ anyị, nke na-ewulite ebe a na-eji ụgbọ okporo ígwè arụ ọrụ nwere usoro ọgbara ọhụrụ nwere ike imesi elu ike, nwere asambodo HPI nke German State Railways Deutsche Bahn nyere, nke bụ otu n'ime ndị isi kacha mkpa na ngalaba usoro ụgbọ okporo ígwè nwere asambodo TSI (Interoperability Standard). 
Companylo oru anyi, nke na-ewulite ebe a na-eji ugbo okporo igwe aru oru nwere usoro ogbara ohuru nwere ike imesi elu ike, nwere asambodo HPI nke German State Railways Deutsche Bahn nyere, nke bu otu n'ime ndi isi kacha mkpa na ngalaba usoro ugbo okporo igwe nwere asambodo TSI (Interoperability Standard). 