It is "The 101" in SoCal - anything else would be odd. Similarly, it is "101" in NorCal - anything else would be odd. Native Californians code switch based on

It is "The 101" in SoCal - anything else would be odd. Similarly, it is "101" in NorCal - anything else would be odd. Native Californians code switch based on location. Some Socal history: How Los Angeles got in the habit of putting ‘the’ in front of every freeway name https://la.curbed.com/2017/9/6/16264074/socal-los-angeles-the-freeways https://la.curbed.com/2017/9/6/16264074/socal-los-angeles-th...