First of all, I'm not an airline pilot, so please excuse my ignorance. The biggest thing I've flown is a 172.
Can someone explain to me the benefit of having, say, a 9,000 foot runway with 1000 foot runoffs on each side, versus a 11,000 foot runway with no run-offs? (Provided the runoff isn't made of engineered arrestor materials and the aircraft isn't close to limits for a 9000 foot runway.)
And in the case of AF358,
it exited the runway at 150 km/h. What's a typical stopping distance on a wet runway for an A340 at 80 knots?