I'm curious as to why some major streets come to a dead end and/or do not continue thru as is. I understand the affect of when a large industrial facility took over a swath land; i.e Chrysler Plant on the Eastside where all roads heading east out of downtown end at St. Jean.

The one that i'm most curious about is Northbound Russel at Canfield St. Why doesn't Russel connect with Canfield?Attachment 35529

Or why does E. Forest dead end at Cadillac, and not continue to St. Jean?