ChiefJoJo, on Dec 12 2007, 10:12 PM, said:
I usually think of streetcars as almost always running on the street, at grade, in mixed traffic... similar to the Portland Streetcar. I think of light rail as tending to run in it's own right-of-way, but also being nimble enough to run in mixed traffic in certain applications. Portland's MAX also fits this definition nicely. Around the center city, it operates in it's own lanes, but runs directly on the downtown city streets at grade. When the line moves just outside of the center city area, it typically operates in an exclusive ROW.
Being a consumer of the Portland system I never really understood the difference other than the funding for the street car was privately driven. There is a bit of difference in the size/weight but the Max and the Streetcar are pretty similar. The Streetcar does operate as a single vehicle.
Both are great and both have made a big difference in the Portland metro area.
One other thing that lines up with ChiefJoJo's remarks. The Max has stretches where it travels very quickly on dedicated track and no stops. The Streetcar sticks to a central area where it is always traveling on city streets.
Again, as a consumer both work well for me. They influence where I invest. Similar to how I invest in London the Tube is a different category.