The foundation study, offered in October, found the existing system can adequately handle anticipated library traffic.
The Dallas Morning News reports the new review notes the Bush study does not look at traffic impact until 2015, two years after the library is to open at Southern Methodist University.
University Park director of public works Gene R. "Bud" Smallwood says he is asking the Bush Foundation for more information. A foundation official did not immediately comment.
A public hearing on library development was scheduled Tuesday by the city's planning and zoning commission.