Vuchic, Vukan R2023-05-222023-05-2219772017-01-10https://repository.upenn.edu/handle/20.500.14332/33983flash_audioPosted with permission from UITP (http://www.uitp.org/).Civil EngineeringEngineeringSystems EngineeringTransportation EngineeringDiscussion of Reports at the 42nd UITP International Congress in MontrealPresentation