traffic solutions 2pi presentation

Created by: Belisario Hernandez Romo San Diego CA 858-366-8128

All Rights Reserved Copyright © 1986-2010

•Alternative intersection concept

•Higher capacity

•Metropolitan Mobility Technologies Corp (MetTra)

Two Phase Enhanced At-Grade Intersection System (2PI)

Two Phase Intersection Option



Interstate 15 Bus Rapid Transit

•Divide the intersection

•Advance left turn crossover

•Eliminate left turn conflicts at main intersection

Two Phase Intersections – The Concept

Advance Intersection

Main Intersection




Main Intersection

Two Phase Intersections – The Concept




Two Phase Intersection – How does it work?




Conventional Intersections vs. 2PI

1

2

3

4

21

Conventional–4-6 lanes flowing–More red time–Limited capacity

2PI System–6-10 lanes flowing–More green time–Much more capacity!




2PI – Case History (Variations)Similar cases in United States•“Detroit Left”

–Midwest•Other variations

–Left turn separation2PI variation completed in 2006 on Airline Road in Baton Rouge, Louisiana

Detroit Left (Indirect Left Turn)

NOTE: In 2002, 2PI concept received AASHTO’s "Francis B. Francois Award" in recognition of its contribution to transportation



2 Phase IntersectionThree typical crossing examples.

A B C

Click page down button on keyboard when symbol

below appears.



to here.

It will take two phases

A wishes to cross from

here



PHASE 1

A



PHASE 2

A



to here

It will take two phases

B wishes to cross from

here



PHASE 1

B



PHASE 2

B



It will take three phases

wishes to cross from

here C

to here.



C

Phase 1



Phase 2

C



Phase 3

C



2 Phase IntersectionThree typical crossing examples animated simultaneously.

A C

B



Phase 1



Phase 2



Phase 3

End



Mira Mesa Boulevard: Two Phase Enhanced At-Grade Intersection

2PI Details




Reagan Road West

•West of Camino Ruiz

•Commercial area

Travel TimeMorning

Peak HoursAfternoon

Peak HoursLevel of Service

Two Phase Savings -69% -65% C → A (AM)

D → B (PM)

2PI Project Investigation




Camino Ruiz•Third most congested intersection along Mira Mesa Boulevard

Travel TimeMorning

Peak HoursAfternoon


Two Phase Savings -78% -54% E → B (AM)

D → C (PM)





Reagan Rd East

(New Salem St)

•East of Camino Ruiz

•Residential area

•Near Mira Mesa High School

Travel TimeMorning

Peak HoursAfternoon


Two Phase Savings -59% -24% D → C (AM)





Black Mountain Road•Most congested intersection–Forecast (year 2030):

•7,573 vehicles per hour (AM)•9,201 vehicles per hour (PM)

•Along DAR Access Route

Travel TimeMorning

Peak HoursAfternoon


Two Phase Savings -83% -85% F → B





Westview Parkway

•Congested major intersection

•Commercial Area

•West of I-15Travel Time

Morning Peak Hours

Afternoon Peak Hours

Level of Service

Two Phase Savings -68% -77% D → B (AM)

F → B (PM)





I-15 Ramps•Heavy Traffic•Ramp Meters

Travel TimeMorning

Peak HoursAfternoon


Two Phase Savings

I-15 NB -37% -84% C → B (AM)F → B (PM)

I-15 SB -78% -32% E → B (AM)C → B (PM)





Scripps Ranch Blvd•Close proximity to Caltrans right-of-way

•T-intersection–Non-standard

Travel Time

Morning Peak Hours

Afternoon Peak Hours

Level of Service

Two Phase Savings -40% -48% D → C (AM)





2PI Level of Service Data

Intersection Level of Service

Reagan Road West C → A (AM)D → B (PM)

Camino Ruiz E → B (AM)D → C (PM)

Reagan Road East (New Salem) D → C (AM)

Black Mountain Road F → B

Westview Parkway D → B (AM)F → B (PM)

I-15 NB C → B (AM)F → B (PM)

I-15 SB E → B (AM)C → B (PM)

Scripps Ranch Boulevard D → C (AM)

•LOS Improved

traffic solutions 2pi presentation

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