摘要: |
What will the reliability of the transportation system be like in the year 2030. Over the next two decades, many factors that can impact roadway travel conditions, congestion, and reliability are expected to changenamely technology, climate, economy, and energybut it is hard to predict exactly what the changes will be. With so many variables, how can we be ready for what may come. Projects from the second Strategic Highway Research Program (SHRP 2) are exploring innovations and possible trends that can shape the future of travel time reliability. This brief provides an overview of two of those projects: SHRP 2 Project L11 (Evaluating Alternative Operations Strategies to Improve Travel Time Reliability), which identified and evaluated strategies and tactics for improving travel time reliability for users of the roadway network in urban and rural areas; and SHRP 2 Reliability IDEA Project L15B (Proximity Information Resources for Special Events), which developed technology for automatically measuring pedestrian crowd metrics, including the size, movement, directionality, and density of crowds. |