Quality management of road monitoring data

Quality management of

road monitoring data

International seminar on road condition monitoring and material recycling technique

Joint seminar of China RIOH and PIARC TC4.2 Beijing, China, 26-27 March 2014

The Swedish National Road and Transport Research

Institute, VTI

Road condition assessment, measurement and analysis Chairman:

European Road Profile Users Group, ERPUG

www.erpug.org

Overview

• Purpose of monitoring

• The use of data

• Overall quality perspective

• Long term planning versus project monitoring

• Overall quality perspective

• Requirements on parameters

• Quality approval control parameters

• Main responsibility of control and approval

• Situation in Europe

• Reference systems

The use of data

Monitoring for the long term planning;

Knowledge of the condition of an entire

road network including trend analysis

Objects and projects monitoring;

Support in the daily construction and

maintenance

Contracts;

Exampel of road condition database from

Higher level indicators

An indicator can be constructed as a combination of measurable technical parameters.

Technical parameters (example from Sweden)

 Rut depth max, left and right 17 and 15 points

 Mean transversal profile

 Crossfall

 Curvature

 Slope (hilliness)

 Position

 Macrotexture (and deviation) left, middel and right

 Megatexture, left and right

 Longitudianl profile left, right and additional right

Overall quality perspective

The parts in the measurement method that needs special care, operator, hard- and software, ordering and delivering of data including data management.

Technical parameters and indicators should be:

•

Objective

(avoid subjective ratings)

•

Reliable (repeatable and reproducible, many

operators and equipment's should give the same

result)

•

Safe

(traffic speed operations)

•

Sustainable

(standardized, long term contracts

8-10 years)

Main responsibility of control and approval

Level:

l

Main responsibility:

Sensor control:

Equipment

manufacturer/operator

Application control:

Operator/Measurement

company

Total function

control:

Situation in Europe

Many countries have certification procedures to approve operators including their equipment;

Sweden, Finland, UK, Germany and more

Control procedures before, during and after measurements;

Quality system requirements

Approval procedures;

Reference equipment

Total station/Rod and Level Longitudinal profile, Primal Transversal profile, VTI Tvp Position, high accuracy GPS Cracks Image collection Macrotexture,

Conclusions

• Purpose of monitoring sets the requirements!

• Long-term monitoring needs high quality, reliable data.

• Object level monitoring, less important unless performance stated in contracts are involved.

• Standards and specifications are important.

• References equipment needed to make long term stability

• Certification procedures should be encouraged

• Control schemes, daily checks and calibration

• Operator, positioning and data management the major source of errors!