1) In addition to Salt Lake City, San Diego and Trenton-Camden both have light rail lines that share tracks with standard freight trains. Additionally, in the German city of Dresden they do deliver freight by light rail; Google the term "CarGoTram" and be enlightened.

2) It is clear that Alice chooses to ignore facts which are inconvenient to her, and speaks from presumption. In truth, Interstate MAX (that's the Yellow Line, Alice, since you're clearly confused) was ahead of schedule and under-budget. Budget estimates are just that: estimates. Prices for materials and time needed for work cannot be accurately or precisely anticipated in any major design and/or construction project. That goes for highways, buildings, vehicle engineering, aerospace; you name it. Instead of inappropriately scorning Interstate MAX (which, again, was not over budget, contrary to your claims), why don't you display as much outrage with over-budget highway projects, of which there are certainly no shortage? Or would that be too inconvenient for your unjustifiable anti-rail bias?