London Irish, after the debacle of Libya which was quite unique, most Oil and Gas companies rallied around to collect lessons learnt and as stated, these lessons formed the new type of evac planning. I'll rustle around in my files and see if I can find it to post. It's a guideline only but there are a couple of things to remember;
1; If you are evacuating, every other expat organization and affluent local is doing the same, using the same roads, planes, airports so the plans do not take into account the mass exodus that takes place (this is in general terms). Infrastructure is overwhelmed so its usually not the case you are tootling along the road as per a normal day and hopping on a plane. That is when the fun starts.
2. Plans never take into account human behavior. Great on paper but you try telling a load of professionals who at most have only been near a fight in a bar and not been exposed to life threatening or simply dodgy situations saying, we will calmly go here, do that, hop on a bus etc. 'Some' people react to these things in the most extreme fashions if they think their life is in danger. Panic breeds panic and no amount of planning or instructions on a paper plan can deal with that, and that is why a good security guy needs to use all the tools in his arsenal to calm the situation before it gets out of hand. Remember many others are evacuating around you so its not only the panic/emotions/anger in your group that you deal with, its gets infectious. I have done 4 full country evacuations and managed multiple partial evacuations or crisis situations. Evacuations are a very simple 'guideline' process, a lot simpler than people think, but in the end, its people management you must deal with, on the ground and in the Corporate office. They get fed Fox News and sensationalized accounts of the situation on the ground, and they cause you a heap of problems as well. In short, there is a structure to follow that takes into account what I have described above.