On 21 January 2018, a McDonnell Douglas MD83 which had just landed on one of the two parallel runways at Isfahan, entered the roll out end of the other one and began taxiing on it in the opposite direction to an ATR72-600 which was about to touch down at the other end of the same runway. The Investigation found that the MD83 had failed to follow its taxi clearance but also that the TWR controller involved had failed to instruct the conflicting ATR-72 to go around, a requirement that was not optional despite the 4397 metre runway length.