Why is traffic congestion a major problem in Rome?

Traffic congestion in Rome is a persistent challenge driven by several interconnected factors:

• High Vehicle Density: Rome has one of the highest rates of automobile ownership in Western Europe, with over a million automobiles and motor scooters contributing to the city's difficult traffic conditions.12
• Urban Infrastructure: Much of the city’s layout is based on medieval street plans that were never designed to accommodate modern levels of vehicular traffic. Furthermore, the city's rich archaeological heritage often complicates and impedes the expansion of public transit, such as subway construction, which could otherwise help reduce road traffic.21
• Historical Planning: A fundamental issue, dating back to ancient times, is urban planning that directs traffic from all areas toward central crossing points.3
• Environmental Impact: The high volume of traffic has led to significant noise and air pollution, which also accelerates the deterioration of the city's historic monuments due to vibration and fumes.1

To address these issues, the city has implemented various measures, including banning private vehicles from certain historic sections and expanding public transit options like subway lines and tramways.12