Link to the post. From the article:
"But in a way, that’s even more sobering than if the fault were localized in USDOT, since it provides clear and compelling evidence that the nation’s entire transportation forecasting apparatus is completely broken. In the aggregate, all of those hard working forecasters in all of those state DOTs are just making up numbers. Worse, it appears that these traffic forecasters have had no incentive to correct their work, incorporate new information, or even ensure that their forecasts pass the laugh test."