From: Transport Canada A runway excursion occurs when an aircraft on the runway surface leaves the end (overrun) or the side (veer-off) of the runway surface. Runway excursions can occur on takeoff or landing. Want to know more? Advisory Circulars AC 705-005 – Approach and Landing During Convective Weather Conditions AC 300-007 – Engineered Materials Arresting Systems for Aircraft Overruns AC 302-015 – Runway End Safety Area Bearing Strength Requirements