CHICAGO -- Hundreds of Midwest manufacturers stand to benefit from a web of high-speed passenger rail routes emerging from Chicago's rail hub, according to a report released by an environmental policy group that has fought to defend the use of billions in taxpayer money on such projects.The report released Friday by the Chicago-based Environmental Law & Policy Center found that 460 manufacturers in seven Midwest states are poised to reap new business, along with a dozen more highly visible companies that make rail cars and locomotives.