TYB
JEEP
The Joint Emergency Evacuation Plan was a U.S. Department of Defense proposal from 1961. The plan initially was for emergency transport of "certain personnel necessary to maintain strategic direction and control of United States Armed Forces and resources during a national emergency" (for example, if the armed forces went to CONUS DEFCON 1). By the late 1970s, the program included various priority levels for transportation.
"Other emergency assignees … not earmarked for helicopter relocation, will proceed as soon as possible to their respective sites. Means of transportation will be an individual responsibility." For most cabinet officials and members of Congress, they were to report to the nearest FBI field office for directions to their evacuation point; within the National Capitol Region they could expect to be picked up by official vehicles. This provision resulted in a large number of persons legislators, non-military government officials, current and retired FBI and Secret Service agents, etc. with detailed knowledge of supposedly-secret shelter locations, especially the Alternate Military Command Center (Raven Rock) and "High Point Special Facility" (the Mount Weather complex in Virginia). The printed "instruction cards" were especially a security issue.
Continuity of government plans called for hundreds, or even a few thousand, sites that could be used by "presidential successor support teams"; most of these sites were resort hotels and other remote, rural, self-sufficient facilities. These were not bunkers, but had emergency generators, food supplies, radios, and other items.
The lack of security about shelter locations led the government to construct ten small bunkers in the early 1980s, as part of the JEEP system itself. Another eight existing bunkers were given JEEP functions as the program expanded. Keep in mind that all of this is part of a larger web of related government programs. The majority of the ten new bunkers were within two hours drive of Washington, D.C.
The JEEP system had three levels of evacuees:
CRYSTAL-1: critical national leaders, usually around 40 or 50 persons. These would be evacuated by helicopters and the Secret Service, to Mount Weather or to the Greenbrier bunker, various airborne command centers, or other major survival shelters.
CRYSTAL-2: a few hundred less important officials would be contacted with directions to a bunker or an FBI field office. In the Washington DC area there was some effort to convoy (e.g, rideshare) these persons.
TREETOP: former officials, corporate leaders and other persons considered "capable of exercising national government after a nuclear war." These, too, would have to transport themselves, or catch a ride with a convoy.
http://asmrb.pbworks.com/w/page/140166450/JEEP%20Sites
https://www.globalsecurity.org/military/agency/usaf/afnsep.htm