According to the Russian organisers' official tally:
147 countries were represented in Moscow
There were 80 Ministers
21 international public organisations
370 accredited media representatives
1500 delegates overall
$140 million pledged during the conference (although only $2 million of that was from a government).
I didn't have time to mention it previously, but the Unicef representative who spoke in the opening session of the conference made one of the best cases I've heard for why children are at the heart of the case for tackling road safety. Marrying together the safe systems approach with the rights of the child (and last week saw the 20th anniversary of the Convention on the Rights of the Child) it was a thoughtful speech which echoed many of the things Kevin Watkins had said earlier in the week - I'll add the link when possible. It would be great now if Unicef and other child advocates follow through on the logic of their words. Then maybe at the next Ministerial in five years time we can take the numbers above and double them.