In a highway renewal work in the summer of 2014, a 500 kg heavy bomb from the Second World War was found on 19 August between the Offenbacher Kreuz and the junction Obertshausen. For defusing the A 3 between the Offenbacher cross and the junction Obertshausen was closed in both directions. Since it was not possible to remove the detonator of the British dud, the bomb had to be blown up on site. The result was a crater with dimensions of about 10 × 5 meters and a depth of about 3 meters. Furthermore, the road superstructure of the first lane and the stationary strip of the directional road raised up to about half a meter. The road to Würzburg was closed until 21 August.