Post on 22-Mar-2021
Road Condition Surveys with Smart phones
• Lars Forslof, CEO/Founder of Roadroid:
• Linkedin: http://se.linkedin.com/pub/lars-forsl%C3%B6f/28/716/720
Why survey? – to make actions in time!
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Serie1
Serie2
Serie3
One point each second
Analyse 100 vibrations -> 1 value per second
(X,Y RC) 620029.012, 6782994.850, 3,5
Estimated IRI per road section
How does it work?
IRI spatially
matched to
a road link
IRI points
every second
Roadroid Accuracy
• University of Auckland– Myles Johnston (2013)
– USING CELL-PHONES TO MONITOR ROAD ROUGHNESS,
– Roadroid has an 81% similarity to Laser data and can represent the roughness felt by a road user to a ‘good’ level.
• The World Bank + University of Pretoria– M Schlotjes, A Visser and C Bennett (2014) – EVALUATION OF A SMARTPHONE ROUGHNESS METER
– ...within the accuracy limits of an IQL-3 device of +/- 20 % of the IRI, the equipment satisfied the need!
– Roadroid has great potential as a low-cost, practical device for measuring road roughness at IQL-3 level.
• Our own research– 75-85% (R2 0,5-0,8) depending on speed, and pavement type.
• OVERALL – ACCURAYCY ACCORDING TO WB IQL level 3
• Email lars.forslof@roadroid.com to get this independent reports…
Waikato District New Zealand- Roadroid compared with Opus NAASRA
Different vehicles – and phones are different
So its possibile to calibrate…• Run system on a ”known” section defined by IQL 1 or 2.
• Run Roadroid in a certain speed (car and phone)
• View result in app survey monitor - Adjust sensitivity
International Roughness Indexhttp://en.wikipedia.org/wiki/International_Roughness_Index
• Objective and global road measure
• World Bank 4 Information Quality Levels:
– IQL1 - Precision profiles, down to 20 m
– IQL2 - Other (older) profilometric methods
– IQL3 - IRI by correlation/vibration response
(as Roadroid), down to 100 m.
As other methods depends on setup and use!
– IQL4 - Subjective rating (pen+paper)
9
Most Important:
- Collect data to the appropriate level of decision you are making
Capture IRI
– and photos100 m – 1,6 km
Monitoring unsealed road performance
Limerock after 42 daysAP20 after 7 days
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AP20 + Lime rock
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AP20 (Crushed rock)
= Improved road constructions
Road inventory
Road inventory
Guard rail
inspection
Montenegro
1. Record…
3. Make inventory
Capture Video:
–make back office
inventorys
2. Upload…
Inventory photo by photo – adds to one average for a section
Upcoming – doing inventory from photos
Previous Next
Capture dust binding-Backwards facing camera
We look on automating
by image analysis of:
-> Contrast
-> Colour spectra
App for traffic counting
• The Traffic count app registers visual input of traffic flow. The app aim to replace pen and
paper for temporary issues where automatic sensors can’t be used.
• The app should be easier to use in the field than pen and paper, and the data presentation is
done instantly with no interpretation of hand notes.
• Typical user cases are those who need to verify and calibrate automatic traffic sensors, for
temporary checks or for low volume roads.
Live datahttp://www.roadroid.com/Map/MapSensor
Classified traffic
and ground
temperature
US Countys…
Spatial data:
Longitud/Latitude
Altitude (Grade%)
Speed
Road inventorys:
Rutting
Edgebreakes,
Drainage
Culverts etc Performance monitoring
• Map overviews
• Tables
• Charts
Traffic + temperature
Road condition:
IRI
Photos
Video
Simply gather data of your LVR:s!!!
Main benefits
1. Easy to operate1. Also an accuracy parameter!
2. Easy to use
3. Spare parts (nothing rare or expensive)
4. Knowledge (no experts needed to setup)
2. Portable and durable1. Easy to bring anywhere (and bring back)
2. Dont draws attention to it (damage/theft)
3. Durable (do not break often, easy to replace)
3. Overall economy
Pricing structure
Prices depends on:
a) amount of installations (phones) and
b) binding-time, the time you commit to use the system.
There is a license cost per month and unit. Minimum is 1 unit - 1 year. The
more units you have and the longer time you bind them – the price per unit and
month gets lower.
Prices
• Roughnes Data Collection Unit (RDCU) range from 200 USD/month/unit
inclusive the Road Data Management System (RDMS).
• Road Inventory Units (RIU) from to 100 USD/month
• Traffic count app - 50 USD/Month
Invoicing is done yearly in advance paid to BIC and IBAN numbers.
Download apps:
www.roadroid.com/home/app - 2 month free account!
After installation, click Roadroid logo under about to send a registration email.
- Suitable phones: Samsung S5-S7
- Read through quick start guide at: http://www.roadroid.com/common/References/Roadroid%20User%20Guide%20-%20Version%202%20Pro.pdf
- Important with a good car mount!- https://www.amazon.com/Logitech-Drive-One-Touch-Smartphone-
Mount/dp/B00KNU9L1Q/ref=sr_1_2?s=wireless&ie=UTF8&qid=1487941443&sr=1-2&keywords=logitech+magnetic+mount
- https://www.amazon.com/Samsung-Universal-Suction-Discontinued-Manufacturer/dp/B0089VO7HE
Lars Forslöf, CEO/Founder of Roadroid - lars.forslof@roadroid.com
AWARDS:
International Road Federation – Global Road Achivement Award 2014
UN World Summit Award – Global Champion 2013
Europeean Satelite Navigation Competition 2012
Videos:
Introduction: https://www.youtube.com/watch?v=BXD2-au5afM
News clip from New Zealand: https://t.co/dVHwLAWlMZ
Thank you for listening!