Design And Execution Of Works For The Task Entitled "Improvement Of Safety At Selected Rail-Road Crossings In The Area Of: Iz Częstochowa, Iz Kielce, Iz Kraków, Iz Nowy Sącz, Iz Opole, Iz Rzeszów, Iz Sosnowiec, Iz Tarnowskie Góry" As Part Of The Project Entitled "Improvement Of Safety At Rail Crossings - Stage Vii" Implemented As Part Of ... (Kpo)