Sadly there have been five major Runway Collisions since 1977 that have claimed 778 lives.
The deadliest and the world’s worst airliner crash occurred in 1977 at Tenerife between two Boeing 747s and claimed 583 lives.
Here is the list from aviation-safety.net
1977: A KLM 747 taking off in fog at Los Rodeos Airport slammed into a Pan Am 747 which had not cleared the runway in a ghastly mixup between pilots and ATC. The KLM captain assumed the Pan AM 747 had left the runway and was in a hurry to get going after a lengthy delay due to a terrorist attack read more ⇒
Source:: AirlineRatings.Com