Originally Posted by
paradoxbox
i think that takeoff clearances should only be issued when an aircraft requiring a runway crossing is STOPPED.
this kind of incident happens all the time all over the world. the causes are plenty - the crew didn't hear the call, didn't realize it was addressed to them, or maybe they were busy doing after landing checks, etc. etc. none of it is really excusable for unprofessional conduct but we all have to work in the interest of safety to prevent idiots from causing accidents.
Like I said earlier, these incursions occur after a correct read back of the hold short instruction. What are these crews doing between reading back a hold short instruction and crossing the hold line? They should both be eyes out looking for the hold line. If they are doing checklists then that is an issue and a dangerous distraction.
Your suggestion would result in a movement rate less than what could be achieved mixed mode on a single runway.
Eye height is a consideration as many of the incursions were CRJ or ERJ135/145. Recently they are including E175s which are a bit higher.
The runway hold lines have the regular yellow hold lines, enhanced runway proximity markings, wig wags (runway guard lights to give them their correct title) and a brightly illuminated red stop bar. The only thing other than a physical barrier that can stop the aircraft crossing the line is the actions of the crew.