I found this wrinkle in the debate over future rail in the Minneapolis-St. Paul area pretty interesting. The University of Minnesota, which would naturally want more rail, is concerned about whether trains would run so close to science labs that they could ruin research experiments.
Meanwhile, new rail routes are in the works for the Minneapolis suburbs. One is more expensive because of a tunnel. The cheaper line also takes advantage of existing public land, which is very helpful, at least theoretically. Given the backlash against eminent domain generally, you’d hate for that to throw a wrinkle into plans.