 
        
        
      
    
    M3 Cityringen
Copenhagen Metro
by Arup, in a joint venture with Cowi and Systra, and Atkins Danmark with Copenhagen’s metro authority, Metroselskabet. 
Copenhagen, Denmark
 
        
        
      
    
    by Arup, in a joint venture with Cowi and Systra, and Atkins Danmark with Copenhagen’s metro authority, Metroselskabet. 
Copenhagen, Denmark