As someone who has used all the references you posted for my job and for exam prep (the 2004 & 2011 Green Books and the 2000 & 2010 Highway Capacity Manuals) - there is almost no difference between editions in terms core concepts, constants and information from tables. From my experience with PTOE exam prep and PE Exam prep you will be fine with either edition.
I think you will see the older standards referenced because that is where the "pool" of questions were originally generated from. Since there is so little difference between the manuals, no one bothers to update the exam questions or standards since you will get the same answer from both books. Remember too that unlike the PE Exam, you can't bring the reference to the exam, so don't expect them to ask you questions about anything so specific that the correct answer would very from edition to edition. Your focus is reviewing concepts, not equations, constants and tabular material.
The ITE Traffic Engineering Handbook has pretty much everything you need to pass the PTOE Exam in it. That is where I would put the bulk of my time and effort - especially if you have recently passed the Civil PE - Transportation Exam.