Generally confirming what Jim said about the end of the trolleys, what remained of the city trolley lines ended by April 1947, and all interurbans but the Norman line ended in November 1946, the latter interurban's last run to Norman being September 27, 1947. Allison & Chandler's fine book, When Oklahoma Took the Trolleys (Interurbans 1980) shows the trolley and interurban lines as follows (click on an image for a larger view -- I've color coded the lines in the 2nd picture):
Original Map and then as color coded
About the path of NW 19th Street, I'm not able to find any maps which show the portion west of Grand Boulevard circa 1940-1950 ... that area was not then part of Oklahoma City proper, so it won't show up in the Sanborn maps, nor does the area appear in the "Manley's Map" first published in the mid-1930s and updated through the latter 1940s. I have no other resources which would track the location of NW 19th west of Grand Boulevard during the time period involved in this discussion. If I run across any, I make another comment.
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