Portland & Western Railroad freight train running northward along 4th Street in Harrisburg, Oregon, in 2009. A surprising number of railroads were built in the middle of residential and commercial streets. In many cases, the railroads have since been relocated to separate rights-of-way for safety and congestion reasons, but an April 2008 feature in Trains magazine estimated that some 200 instances of "street running" remain active in the United States. This location is one of several on Portland & Western's Oregon Electric District, which was originally built as an "interurban" electric railroad focused primarily on local passenger service. The passenger trains stopped running in 1933 and electrification ended in 1945, but the street trackage remains, although today it sees only a few diesel-powered freight trains.