Yes, next week is Thanksgiving already, which means the city is gearing up for holiday-related traffic by recommending drivers leave their cars home and opt for mass transit on certain congested days. Besides today, the other holiday gridlock alert days are Wednesday, 11/24 (the day before Thanksgiving); Tuesday, 11/30 (the day the Rockefeller Christmas Tree is lit); December 10; December 15-17; and December 22-23.