But the main cause for the hours of standstill, according to De Boer, was caused by navigation systems that indicated a shorter route. “Rijkswaterstaat has set up diversions via the A12 and A27, but if it gets busier there, navigation systems will recalculate the route and come up with a faster option.” This led to it getting busier around Nieuwegein, which resulted in hours of traffic jams.