Delta Junction is the true end of the Alaska Highway. Going north or south, you will be traveling on the Richardson Highway, which starts in Valdez mile 0 and ends in Fairbanks, mile 364.  Delta Junction, sitting on the Delta River, is also the site of a permanent maintenance station for the trans-Alaska pipeline.

Delta Junction was originally called Buffalo Center and was a construction camp during the building of the Richardson Highway. The Richardson was a wagon road in the early 1900's but was upgraded to accommodate automobile traffic in the 1920's.     Wikipedia