Tuesday traffic is notoriously heavy due to a combination of modern workplace habits and social psychology. Traffic data from companies like INRIX consistently shows that mid-week days—Tuesday, Wednesday, and Thursday—are the peak congestion days in most major cities. This is largely because Monday and Friday are the most popular days for employees to take a long weekend, work from home, or call in sick, resulting in a "hollowed-out" work week. On Tuesday, however, almost the entire workforce is typically in the office. Furthermore, many part-time workers or those on hybrid schedules are often required to be "in-person" on Tuesdays for meetings and collaborative projects. Unlike Monday, when people are often sluggish or catching up on emails at home, Tuesday is often the day when site visits, deliveries, and client meetings are scheduled, adding commercial vehicles to the mix. There is also a psychological element; after the "transition" day of Monday, Tuesday is when the full momentum of the business week hits, leading to a concentrated rush hour. This creates a "perfect storm" where high office attendance meets high commercial activity, making it the most congested morning of the week for many commuters.