The document discusses transportation system management and operations (TSMO) and travel time reliability. It outlines how TSMO focuses on optimizing traffic management, traveler information, incident management, and demand management using multimodal and technology-based approaches. Travel time reliability is defined in terms of variability in travel times and key measures like buffer time. Ways to improve reliability include incorporating TSMO strategies, providing better traveler information, managing incidents and special events, and implementing roadway performance strategies. The transportation landscape is changing due to trends in demographics, the environment, technology, and other factors. Agencies should respond by prioritizing performance-based projects, integrating data and technologies, and partnering with the private sector.

1. Transportation System Management and Operations & Travel Time Reliability Presentation by Marais Lombard, PE

6. Why Does Reliability Matter?

7. Example Day-to-Day Variation in Travel Time

8. Key Reliability Measures Value Provided to User Definition Measure The extra time a traveler should allow to arrive on-time for 95 percent of all trips The 95 th percentile travel time minus the average travel time divided by the average travel time Buffer Index (%) How much larger the potential total travel time is than the ideal or free-flow travel time The ratio of the Planning Time to the Ideal or Free Flow Travel Time Planning Time Index The total travel time a traveler should allow to arrive on-time 95% of the time 95 th percentile travel time Planning Time

9. Graphical Illustration of Reliability Measures

10. Sources of Congestion

11. How can Reliability be Improved?

29. We are currently in a Downward Cycle } Net Effect Less local, regional, and economic competitiveness

31. The Vision: An Upward Cycle } Net Effect Improved local, regional, and economic competitiveness