Ok. I will try to investigate this more, but so far I haven't noticed this issue in my city.No, it is people "going to work", they park their car in the commercial lot, they do 5 steps, then they become "going home", back to the car and drive away.,So the problem is with the Going to Shopping behaviour not Going to Work?
If you build the marketplace building and look at it from 5:00 am to 11:00 am (morning rush and people going to work) you will notice this behaviour since that building has 600 employees so it is the best way to test the issue.
What I would recommend is that you install my mod "Trips View" and after you run the game for a whole day check the "Trip Purpose" graph and share it with me. That graph will indicate when the rush hours for work are happening. The peak for AM should be around 8-9 AM and for the evening should be around 5 PM