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European Transportation GIS SummitReal-Time Systems

Space Time Analysis of Pavement Monitoring

Dr. Thanos Doganis Terra Ltd.

Georgia Gkania MSc Attikes Diadromes S.A.

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European Transportation GIS Summit May 10 – 11 2017 Berlin

Where are we

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Key figuresTotal Length 70 km

Lanes per direction 3 + Emergency Lane

Toll road Interchanges (I/C) 29

Toll stations 39/195 L.

Service/Side road network 150 km.

Overpasses 100

Underpasses 25

No. of bored & cut & cover tunnels 56

Length of Tunnels & cut & cover sections 12,5 km.

Length of flood protection works 67 km.

No. of Motorist Service Stations 4

Average transaction / day 0,25 million

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Key Dates Tender submitted 28/02/1995

Concession awarded 23/05/1996

Ratification of Contract 16/12/1996

Full Financial Close 06/03/2000

First Drawdown 04/08/2000

First section in operation 19/03/2001

Completion of the project 24/06/2004

End of Concession 05/10/2024

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GIS at Attiki Odos

Assets Failures Incidents AVL SignageSafety

barriersTraffic

VolumesPavement

ETC Statistics

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European Transportation GIS Summit May 10 – 11 2017 Berlin 7

Pavement


Life Cycle Cost

Resurfacing

• €€

Rehab

• €€€

Reconstruction

• €€€€€€€€€

Time

Co

st

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Lowest Life Cycle Cost

Source : Pavement Asset Management Report WS DOT 08/02/2016

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Parameters Measured

Measurments

Structural characteristics

Structural condition

Functional characteristics

Roughness

Skid resistance

Texture

Rutting

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Classification According to Measurements

Level 1 Level 2 Level 3

Good Condition

Moderate Condition

To be investigated

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Roughness

IRI* is used as a measure of current condition and a trigger for resurfacing. Expressed in m/km

* IRI International Roughness Index


IRI < 1.5 m/km 1.5m/km <IRI < 2.5 m/km IRI > 1.5 m/km

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Roughness Accepted Values in Various Countries

0

1

2

3

4

5

6

7

8

9

10

Greece (Highways) USA Brasil Spain

IRI* Values

Excelent Good Fair Poor

* IRI International Roughness Index expressed m/km

m/k

m

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Skid Resistance (transversal friction)

friction factor or skid number


GN > 0.6 0.6 > GN > 0.41 0.41 < GN

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Rutting


RD < 13 mm 17mm > RD > 13mm 17mm < RD

Rutting Depth (RD)

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Surface Texture

Mean Profile Depth MPD


MPD > 0.8mm 0.8mm > MPD > 0.5mm MPD < 0.5mm

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Structural Characteristics D0 and SCI

Surface Curvature Index SCI and D0 (using Falling Weight Deflectometer)


D0 < 90 90 < D0 < 270 D0 > 270

SCI < 30 30 < SCI < 90 SCI > 90

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Measurements• External Contractor: National Technical

University of Athens (NTUA).

• Periodically from biannually to every two or three years to depending on parameter.

• Measurements Density for functional characteristics (RD,MTD,GN and IRI) every 10 meters in all lanes.

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Organize Measurements

Linear Referencing System

(Route, Position, Lane, Time)

To Time Enabled Point Feature Classes (SQL Server)

From Measurements

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Identify & Search in space and time

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But what is the overall condition?

Texture classification September 2016

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European Transportation GIS Summit May 10 – 11 2017 Berlin 22

81%

16%

3%

2016

Good Condition

Moderate Condition

To Be Investigated

Classification

82%

15%

3%

2008

IRI comparison of Classifications between 2008 and 2016 23

Is this evenly distributed?

Or there is concentration in certain areas? 24

Group measurements…

…and examine aggregated results25

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Classification video through years

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Change through time

0.97

0.98

0.99

1

1.01

1.02

1.03

1.04

1.05

1.06

0 2 4 6 8 10 12

(Branch E from km 14 to km 15)

Years

Ave

rage

IRI*

*International Roughness Index

ΔIR

I = 0

.08

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To understand the change, map the differences

Index Actual ValuesIRI30

To understand the change, map the differences

Accepted Values Classification Deterioration31


All of the above

•Packed as Web application and disseminated.

•Selections and exports to Excel files.

•Consumed as backdrops in CAD systems.

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More Info:

Thanos Doganis [email protected] Gkania [email protected]

mailto:[email protected]

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