Dynamic responses, GPS positions and environmental conditions of two light rail vehicles in Pittsburgh
  
  
    
  
  
  
  
  
    
  
  Jingxiao Liu, Siheng Chen, George Lederman, David B. Kramer, Hae Young Noh, Jacobo Bielak, James H. Garrett, Jelena Kovačević, Mario Bergés
  
  
  
  
  
    
    
      
    
    January 2019