copenhagen, denmark 19-20 october 2017 van aalst erp… · copenhagen, denmark 19-20 october 2017...
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COPENHAGEN, DENMARK
19-20 OCTOBER 2017
AUTOMATED INSPECTION AND MAINTENANCE PLANNING IN THE NETHERLANDS - UPDATE
Petra Paffen and Frank Bouman, RWSWillem van Aalst, Peter-Paul Schackmann, TNO
15-10-2015
Rijkswaterstaat
AUTOMATED INSPECTION AND MAINTENANCE PLANNING IN THE NETHERLANDS - UPDATE
Dutch challenges
History
Recent developments Cracking Evenness
Work in progress Raveling on fine porous pavements
EU - Benchmark
DUTCH CHALLENGES
85% Porous asphalt
Normative damage: 85% stoneloss or ravelling 10% cracking (PA) 3% skid resisitance 2 % rutting and unevenness
Average time to maintenance: AC (DAB) 18 yrs left, 12 right, 15 overall PA 0/16 (ZOAB) 17 yrs left, 11 yrs right, 14 overall PA 4/8 (TLZOAB) 13 yrs left, 9 right, 11 overall
Spread in lifetime & short lifetime fine graded asphaltmonitoring important!
HISTORY:FROM RESEARCH TO IMPLEMENTATION
2009 - 2010: Feasibility
2010 - 2011: Proof of concept
2012 - 2013: First generation
2013-2014: New vehicle
2014-2015: Update (colour)
ERPUG 2015:
Raveling PA 0/16 (ZOAB)
Raveling PA 4/8 (2LZOAB)
Maintenance interval modelling
Cracking (all pavements)
2015-2017: measurements and maintenance planning on full network!
TRL – 1
TRL – 2
TRL – 3
TRL – 4
TRL – 5
TRL – 6
TRL – 7
TRL – 8
TRL – 9
RECENT WORK: SURFACE CRACK AUTOMATION
Situation: Surface cracking more pronounced (~10%, fine PA)
3D data available (from raveling measurements)
Automation of surface crack measurement and evaluation:
3D data
Crack detection
Maintenance interval
RECENT WORK: SURFACE CRACK AUTOMATION
Current solution: LCMS-1 measurements
Crack detection
Post-processing (filtering, clustering)
Historical reference (type, class)
Visual check (from screen) when necessary!
Time to maintenance (model)
Check abnormalities (screen, road)
Operational in 2016 & 2017
RECENT WORK: EVENNESS
RWS LCMS-1 With IMU Measurements in 2016
Rutting
IRI/HRI
Cross-slope
Reference: RWS ARAN-3 Entire road network (rutting) 14 test sections (IRI, slope)
EVENNESS – SOME RESULTS
Positive results! High correlation te reference
Very repeatable
2018: ready to measure full Dutch network
HRI-100
Rutting
HRI-100Rutting
USE OF MULTIPLE GENERATIONS
3D LCMS data 1x5 mm
ZOAB 0/16
~1 x 1 m
2012-2016
Current use: Effect rejuvenators
Time to maintenance
Research
… R006_1HRL_2RL_290.0_289.9
WORK IN PROGRESS:FINE POROUS PAVEMENTS Raveling on fine porous pavements Trend in aggregate size: 0/16 4/8 2/6 (noise reduction)
August 2017: test with LCMS-2 system Various tests (1x1, 1x2, 1x5 mm) >1600 km highway (1x1, 1x2 mm)
Porous Asphalt0/16 mm 4/8 mm
SOME PRELIMINARY RESULTS
Detailed visual inspections A59
LCMS-2 - Range LCMS-2 - Intensity
WORK IN PROGRESS
Inspection: ~16% raveling
Photo
WORK IN PROGRESS
Raveling on fine porous pavement (LCMS-2, …)
Detection of new or changed pavements
Deep learning for ‘crack’ classification (not detection!)
Several other topics …
TECHNICAL SUMMARY
Single measurement vehicle (LCMS)
Algorithms and Automated processing
Time to maintenance predictions
Work in Progress: Raveling on fine porous pavement
Detection of new or changed pavements
Deep learning for ‘crack’ classification
…
Surface distress indicators: Raveling (ZOAB, 2LZOAB)
Cracking
Evenness
Rutting
IRI
EU – BENCHMARK
EU – BENCHMARK: SCOPE
In 2015 RWS sent out a questionnaire to several European road operators to investigate for the different countries: How road maintenance planning is done?
What kind of asphalt types are applied?
What kind of surface deficits occur (with %)?
How the road is monitored?
Desired outcome of this questionnaire, and follow-up discussions, was to identify: Mutual challenges
Topics of collaboration
EU – BENCHMARK: MAIN RESULTS (1)
AC, SMA16 and concrete are mostly applied, but noise reducing asphalt like porous asphalt (ZOAB 0/16 and 4/8) and SMA8, SMA11 are becoming increasingly popular
In all countries road measurements, with varying frequency (every lane every year till right lane every 5 years), are taken place Detection of unevenness (rutting, IRI) is mostly fully automated
Detection of surface cracks and raveling (fretting), both also occurring frequently, is rarely automated. Visual inspections from camera pictures and / or on the road is most common practice
EU – BENCHMARK: MAIN RESULTS (2)
Developed algorithms using available 3D measurement techniques (see earlier results) can determine unevenness , raveling and surface cracks For finer grades asphalt like SMA8 and PA/ZOAB 4/8 and
PA/ZOAB2/6 the current systems reach their limits
Only a limited amount of suppliers are offering 3D measurement equipment. Techniques with the specifications required are even more rare
All involved countries expressed their interest in techniques and systems able to increase the level of automation in their road monitoring process
EU – BENCHMARK: PROPOSAL FOR COLLABORATION
Sharing results: The level of automation on detecting road surface deficits can be
increased using available 3D techniques. RWS is willing to share its developed algorithms and models. Also RWS would be pleased to further share its experiences and best practices doing so.
Consulting the market Techniques with the specifications required to obtain 3D images are
still quite rare. A joint RFI (Request for Information), bundling our questions to the market for these systems and by this illustrating the potential market for these systems could result in a wider range of products
EU – BENCHMARK: NEXT STEPS
RWS would like to hear from you whether you are interested in further discussions on this topic. RWS will be happy to further discuss and share what’s available.
RWS would also like to hear from you whether you are interested in writing and sending out a joint RFI to the market, to learn what’s available now and what could be available in the (near) future. RWS believes that we all would benefit from such a joint request.
THANK YOU FOR YOUR ATTENTION
Petra Paffen: [email protected]
Frank Bouman [email protected]
Peter-Paul Schackmann: [email protected]
Willem van Aalst: [email protected]
Rijkswaterstaat
19-20 OCTOBER 2017
COPENHAGEN, DENMARK