1. Lessons Learned from Intersection Improvements on U.S. Highway 280 PMI Central Alabama Chapter Darrell B. Skipper, P.E.

2. Project Location Project Limits

3. U.S. 280 Before Improvements Six-lane divided roadway Posted speed limit of 55 miles per hour Daily Volume 60k-80k 24 signals in study area (9 mile segment) Recurring peak hour congestion Roadway is over capacity Congestion costs users in time and fuel Competing Goals: Access vs. Mobility

4. Objectives Low overall cost Quick implementation Minimal impact during construction Fit into future goals Complement adaptive signal system project

5. Goals Use existing, proven tools All work within ROW Maintain existing property access Improve traffic flow Improve safety

6. Project Summary 28 improvements projects developed 11 locations use indirect turns 10 locations where turning capacity is increased 3 locations where one direction of 280 does not stop 3 signal removals, 1 relocation

7. Brook Manor - Before

8. Brook Manor - After

9. Grandview/Perimeter Park - Before

10. Grandview/Perimeter Park - After

11. Valleydale - Before

12. Valleydale - After

13. Total Project Cost $15.6 MM – Dunn and APAC Federal Funds – ALDOT Match Awarded $2 MM Federal grant for use of innovative technology.

14. Construction April 2013 Letting June 2013 Begin Construction August 2013 Phase 1 November 2013 Completion Incentive/Disincentive Phase 1: $10k/day I/D Overall: $50k/day I/D

15. Construction Challenges Sequence of CN SCATS operation Modifications during CN Complaints during CN Public awareness

16. 38% Average Speed Increase

17. 66% Average Speed Increase

18. Traffic Volumes

19. Travel Times Collected using BlueTOAD devices – Anonymous Bluetooth sampling Gps clocks – January – April averages for 2013 and 2014 – Does not account for Adaptive signal system benefits

20. Travel Times Inside I-459 – Westbound AM Peak 28% reduction in travel time – Eastbound PM Peak 36% travel time reduction Outside I-459 – Westbound AM Peak 22% reduction in travel time – Eastbound PM Peak 16% travel time reduction

21. Public Perception

22. Ongoing Constant Maintenance – “280 Czar” Incident response – On call wreckers – PTZ cameras

23. Social Media

24. Stakeholder Interaction Follow-up meetings and involvement

25. More to come AL Hwy 119 – Lane widening, additional turn lanes Walmart I-459 – 8-lanes from Cahaba river to I-459 – Potential fix to NB ramp weave issue

26. Questions