Couple other points on this video before I have to get ready for work.
First, he starts with the six lane road and calls it "divided". No, it isn't. A divided road is called a "dual carriageway" and has a clear barrier between the opposing lanes. Think Deerfoot (grass/concrete dividing areas)
http://en.wikipedia.org/wiki/Dual_carriageway
Secondly, he references a study where raising the limit lowered crashes, and lowering limit raised crashes.
Guess he didn't read the rest of his FIRST report (that I linked to above) which on page 38 of 55 shows many different studies on both situations and the majority of them are the opposite of what he is saying.
Yes, there is some merits at times to what he says (the yellow speed sign for example), but all in all, this seems very cherry picked.
Anyways, have fun all.