How many cars fit in a 12 mile traffic jam?

To estimate how many cars fit in a 12-mile traffic jam, we can assume an average car length of about 15 feet. There are 5,280 feet in a mile, so a 12-mile stretch contains 63,360 feet. Dividing this by the average car length (15 feet), approximately 4,224 cars could fit in a 12-mile traffic jam. However, this number can vary based on factors like spacing between cars and the types of vehicles involved.