
Brinegar served under Richard Nixon, and is best remembered for instituting the 55 m.p.h. speed limit during the oil crisis of the mid 1970s. A lifelong oil man, as a hobby Brinegar indulged in a passion for Mark Twain throughout his life, collecting Twain memorabilia and first editions. He was also responsible for conclusively refuting the attribution of a collection of letters that had previously been credited to Twain.
Elmira College awarded Brinegar an honorary doctorate in 1997 for his work on Twain research. In lieu of services, his family is instead requesting contributions to either the college's Mark Twain Studies Center, or the Mark Twain House in Hartford.