Many types of intelligent traffic systems offer a superior benefit-to-cost ratio than the physical expansion of roads:
– “Traditional” road capacity (2.7)
– Electronic freight management system (2.8-3.6)
– Dynamic curve warning (4.2-6.6)
– Commercial vehicle information systems and networks (2.0-7.5)
– Maintenance decision support system (1.3-8.7)
– Intelligent traffic management (14.0)
– National real-time traffic information system (25.0)
– Road weather management technologies (2.8-37.0)
– Service patrols (traffic incident management) (4.7-38.0)
– Integrated corridor management (9.7-39.0)
– Optimized traffic signals (17.0-62.0)

via Exhibit 24