Global traffic jams are making supply issues worse, delaying deliveries. AGF/Getty Images Three global traffic jams are intensifying the supply chain crisis plaguing the economy. European factories are backlogged, Asian factories are struggling, and ports are congested in the US. It means Americans will keep paying more and waiting longer for their purchases as the holidays near. See more stories on Insider's business page. Americans just can't catch a break when it comes to shopping this year, shelling out big bucks only to wait weeks or months for their purchases. It all has a lot to do with a supply