I can understand your skepticism, but the ASCE is a long-standing, globally respected professional association for credentialed civil engineers - the annual infrastructure report cards they issue are based on the field surveys that not only ASCE member engineers but that various local government and non-government bodies from all around the country take part in and carry out as well.

If you say that you don't want to trust data compiled and reviewed by an association of civil engineers, then you should probably stop using ADA approved toothpaste and cease getting those AMA recommended medical check-ups.

I hope that didn't come across too harshly, but there seems to be a wave of anti-intellectualism that has been spreading across the US. Obviously that sentiment has formed in no small part due to actual abuses that have been carried out by those with vested interests, but we need to be careful that we don't take what would otherwise be a healthy skepticism of the actions and proscriptions of organizations too far and mis-trust all professional organizations or everything that they publish...