A truck has caught fire on the M3 motorway near Bag in Hungary, causing significant traffic congestion. The incident has resulted in several kilometers of tailbacks, disrupting travel for motorists. Emergency services are currently at the scene managing the situation and working to clear the obstruction. The cause of the fire is currently unknown and is under investigation. Motorists are advised to avoid the area if possible and to expect considerable delays. Authorities are urging drivers to follow detour signs and to exercise caution while navigating the affected section of the M3 motorway near Bag. The long queues are expected to persist for some time as the vehicle is removed and the road is assessed for damage.