1. Accessible Pedestrian Signals Presented by: Joe Couples, P.E. Valerie Lee, P.E.

2. Legacy devices remain...but mostly new technology.

3. Seattle APS

4. Accessible Pedestrian Signals (APS) MUTCD 4E.06 Both audible and vibro-tactile modes identified for walk indication. Locator tone identified in support section. Provides guidance for factors that should be considered in study of when to install an Accessible Pedestrian Signal. APS cannot be by TOD operation.

5. Study Factors to Consider Potential demand (needs) for APS. Requests. Traffic Volumes, and turning movements. Signal complexity. Intersection complexity

6. Potential Demand High Volume Transit facilities such as Streetcar and LRT stations. Transit hubs and transfer points. Libraries or other facilities for the blind. Recreation facilities.

7. Requests In Seattle: Until LINK Light Rail and the South Lake Union Streetcar, almost all of the APS installations were based upon requests. Almost all requests were to meet transit, shopping, and employment needs of individual(s).

8. Traffic Volumes Pedestrians may be present at any time. Low Volumes. High turning volume percentage.

9. Traffic Signal Complexity Split-Phasing. Protected Left or Right-Turns. Leading Pedestrian Intervals (LPI). Exclusive pedestrian phase. Other complicated signal operation.

10. Split Phasing

11. Intersection Complexity Skewed intersection geometry. Median islands. Free right-turn islands. Signal complexity. Intersection complexity

12. Intersection Skew

13. Traffic island

14. APS Design Best Practice

15. Design Complications Underground utilities, MH & JB's. Curb ramps. Decorative poles. Light and heavy rail adjacent or in ROW.

16. Design Complications

17. Median Island APS

18. Over-Engineering?

19. Errors or Design Standards?

20. Which is Correct?

21. Office Engineering?

22. APS in Operation Actuated operation. Pre-timed/recall operation. APS Controller Unit.

23. Actuated Operation Pedestrian pushes button to activate. Audible and vibro-tactile activate with “Walk” indication. Returns to holding mode with “ Flashing Don't Walk”.

24. Pre-timed Operation in Seattle “Walk” interval comes on automatically without the audible & vibro-tactile. Some devices able to activate audible & vibro-tactile if adequate clearance time. Returns to holding mode with “ Flashing Don't Walk”, PBS indicator light goes on.

25. APS Settings Locator tone is used. Audible and locator tone volume settings are independently adjustable. Volume adjusts to ambient noise so as to be quieter at night and other periods.

26. Noise Complaints Few complaints regarding audible indications. Complaints regarding audible mostly by multi-story condo or apartment dwellings. Many complaints regarding locator tone in residential areas.

27. APS Prioritization

28. Post Installation Check List

29. APS Sign Message

30. Web Resources NCHRP Web Document 117A, Accessible Pedestrian Signals: A Guide to Best Practices. June 2007 MUTCD 2009

31. Questions?