The document discusses the Two Phase Enhanced At-Grade Intersection (2PI) system, an alternative designed to improve capacity and reduce left-turn conflicts compared to conventional intersections. It highlights case studies, including the successful implementation in Baton Rouge, and the projected traffic forecasts for congested intersections along Mira Mesa Boulevard. The 2PI system is recognized for its innovative contributions to transportation, receiving accolades such as the AASHTO’s Francis B. Francoise Award.

1. Two Phase Intersection OptionTwo Phase Enhanced At-Grade Intersection System (2PI)Alternative intersection concept

2. Higher capacity

3. Metropolitan Mobility Technologies Corp (MetTra)Interstate 15 Bus Rapid TransitTwo Phase Intersections – The ConceptDivide the intersection

4. Advance left turn crossover

5. Eliminate left turn conflicts at main intersectionMain IntersectionAdvance Intersection

6. Interstate 15 Bus Rapid TransitTwo Phase Intersections – The ConceptMain Intersection

7. Interstate 15 Bus Rapid TransitTwo Phase Intersection – How does it work?

8. Interstate 15 Bus Rapid TransitConventional Intersections vs. 2PIConventional4-6 lanes flowing

9. More red time

10. Limited capacity2PI System6-10 lanes flowing

11. More green time

12. Much more capacity!314221

13. Interstate 15 Bus Rapid Transit2PI – Case History (Variations)Similar cases in United States“Detroit Left”

14. Midwest

15. Other variations

16. Left turn separation2PI variation completed in 2006 on Airline Road in Baton Rouge, LouisianaNOTE: In 2002, 2PI concept received AASHTO’s "Francis B. Francois Award" in recognition of its contribution to transportation Detroit Left (Indirect Left Turn)

17. PERSONPERSONPERSONBAC2 Phase IntersectionThree typical crossing examples.Click page down button on keyboard when symbol below appears.

18. PERSONAwishes to cross from here  to here.It will take two phases

19. PERSONAPHASE 1

20. PERSONAPHASE 2

21. PERSONBwishes to cross from here to here It will take two phases

22. PERSONBPHASE 1

23. PERSONBPHASE 2

24. PERSONCwishes to cross from here  to here.It will take three phases

25. PERSONCPhase 1

26. PERSONCPhase 2

27. PERSONCPhase 3

28. PERSONPERSONPERSONBAC2 Phase IntersectionThree typical crossing examples animated simultaneously.

29. Phase 1

30. Phase 2

31. Phase 3End

32. Mira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Details

33. Mira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Project InvestigationReagan Road WestWest of Camino Ruiz

34. Commercial areaMira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Project InvestigationCamino RuizThird most congested intersection along Mira Mesa BoulevardMira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Project InvestigationReagan Rd East (New Salem St)East of Camino Ruiz

35. Residential area

36. Near Mira Mesa High SchoolMira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Project InvestigationBlack Mountain RoadMost congested intersection

37. Forecast (year 2030):

38. 7,573 vehicles per hour (AM)

39. 9,201 vehicles per hour (PM)

40. Along DAR Access RouteMira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Project InvestigationWestview ParkwayCongested major intersection

41. Commercial Area

42. West of I-15Mira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Project InvestigationI-15 RampsHeavy Traffic

43. Ramp MetersMira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Project InvestigationScripps Ranch BlvdClose proximity to Caltrans right-of-way

44. T-intersection

45. Non-standardMira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection2PI Level of Service DataLOS Improved