RTP meaning in Regional ?

Research Triangle Park (RTP) is the largest research park in the United States. It is named for its location relative to the three surrounding cities of Raleigh, Durham, and Chapel Hill, or more properly, for the three major research universities in them: North Carolina State University, Duke University and University of North Carolina at Chapel Hill respectively. The Research Triangle region of North Carolina received its name as an extension of the name of the park. Aside from the three anchor cities, the park is also bounded by the communities of Morrisville and Cary. Approximately one fourth of the Park's territory lies in Wake County, but the majority of its land is in Durham County.