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US-71 Traffic Responsive �Pilot Program

© 2021 Olsson

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© 2021 Olsson

�Fast Facts

700+ Traffic Signals

200+ Roadway Miles

1.6 Million Trips/Day

50/50 Local Agency/ Federal Funding

$800 Local Agency Cost Per Signal

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Traffic Responsive Pilot�ORIGINS

OGL Subcommittee selected as a technology pilot

    • The step between coordinated and adaptive
    • TransSuite (with modification for C2C)

Prioritized candidate corridors based on:

    • Traffic Variability
    • Impact
    • Relatively small and bounded

​

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US-71 Corridor in Kansas City�55th ST | 59th ST | GREGORY BLVD

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6/20/2021

Detection

Map: © Google

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Traffic Responsive Pilot�HOW IT WORKS

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System Configuration

© 2021 Olsson

Min % improvement value

K factor for occupancy

Schedule for active groups

Detector data collection �and smoothing factor

Max % failed controllers

Recalculation period�(5, 10, 15 minute)

Occupancy/volume �signature values by detector�(stored in “groups”)

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Refining Parameters via Modeled Operations

© 2021 Olsson

​

​

​

​

Configuration

 

AM Peak

AM Transition

Off Peak

Smoothing Factor

0.35

​

 

Weight

Vol

Occ

V+KO

Vol

Occ

V+KO

Vol

Occ

V+KO

K Value

25

​

Det 22191657

80

1100

17

1525

1000

12

1300

900

9

1125

%Diff Value

20%

​

Det 22191658

100

1200

17

1625

1000

12

1300

900

9

1125

​

​

​

​

Det 22191659

50

410

3

485

300

1

325

250

2

300

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© 2021 Olsson

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© 2021 Olsson

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© 2021 Olsson

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Traffic Responsive Efforts �US-71 & PROSPECT

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Results

CHANGE PERCENT

Street

TIME PERIOD

SPEED (MPH)

PLANNING TIME INDEX

TRAVEL TIME INDEX

US-71 SB

After

44.75

1.01

0.88

Before

44.63

1.09

0.88

Change

0%

-7%

0%

US-71 NB

After

49.53

1.14

0.91

Before

48.13

1.16

0.93

Change

3%

-2%

-2%

Gregory WB

After

21.54

1.56

1.16

Before

20.73

1.39

1.21

Change

4%

12%

-4%

Gregory EB

After

18.99

1.86

1.37

Before

19.53

1.73

1.33

Change

-3%

8%

3%

Map: © Google

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  • Automatic
      • Plan start/end time adjustment
      • Incident response
  • Algorithm Cost

OBSERVATIONS�

CHALLENGES

BENEFITS

  • Pattern Matching
  • Bi-Directional Operation
  • Hourly fluctuations in volume
  • Minimum plan run-time
  • C2C operation
  • Detection requirements
  • Heavy vehicle operation

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Future Implementation Recommendations

Look for areas that require �occasional “flush” plans

Consider areas that have �a limited number of movements

Include high retail/shopping �traffic areas

Investigate enhancements to �address identified challenges

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QUESTIONS?