(All of the report information below is posted in PDF format.)

You may view the 2011 Urban Mobility Report (5.1MB) and the supporting information below. Or you may view the report with appendices (6.2MB) which includes the report and all supporting information.

Supporting Information

• What causes congestion?
• What is the source of data for this report?
• Measures and rankings within population groups—which measure should be used?
• How should the measures and rankings be interpreted?
• How congested are the roads? Are they getting worse?
• What congestion level should we expect?
• How far has congestion spread?
• What does congestion cost us?
• Can more road space reduce congestion growth?
• Incorporating the effect of operational treatments – 101 urban areas
• Mobility benefits from public transportation service
• Mobility benefits from high-occupancy vehicle lanes
• Combined effect of public transportation and operational improvements
• How should we address the mobility problem?
• Change the usage pattern – examples
• Relieve chokepoints – examples
• Unreliable travel times – one of the congestion problems
• Communicating mobility and reliability issues
• Multiple-state urban areas