Applications
- Network-wide survey of skid resistance (μ SKM) as a condition indicator, and macro-texture
- Inspection/acceptance of new construction and conservation measures
- Measurements under warranty terms
- Clarification of circumstances prevailing near accident hotspots
- Object-specific assessment of skid resistance
Measurement system
- Multiple functions: Skid resistance, macro-texture
- Measurements at high speeds of up to 80 km/h
- Objective results through metrological instruments rather than manual registration
- Self-securing according to HSM 2000 (instructions on securing measurement vehicles)
- Provision of network-wide condition data as an objective information database
Purpose of condition survey and evaluation with SKM
- Provision of network-wide condition data as an objective basis for decisions concerning short-, medium- and long-term conservation
- Optimized use of increasingly limited resources
- Basis for transparent decisions within and outside building administration departments
- Monitoring the effectiveness of measures and impact of delays in measures
- Forecasting future network conditions
- Practical insights into the success/failure of types of measures and building material concepts used for conservation
Parameters surveyed
Localization and orientation system
- Satellite navigation system DGPS (differential global positioning system) with a typical accuracy of +3 m in real time and +1 m in post-processing
- Assignment to the nationwide network node system using raw geo-grids via WGS 84 coordinates
- Measurement of travel by means of pulse generators with a path resolution of 1 mm
- Keyboard input by the operator during the measurement
Evaluation and rating of measurement results
- In accordance with TP Griff-StB under consideration of ARS 24/2003 during measurements as part of acceptance procedures
- In accordance with ZTV-ZEB STB1 in the case of network-wide surveys
- Taking into account latest findings from the Road and Transportation Research Association
Representation of measurement results
- In tabular, graphic and/or cartographic form
- Summary of the results together with other condition indicators determined as part of condition surveys in a road database, e.g. using the STRADIVARI evaluation and visualization software
- Video digitization and creation of a video database including route images on data media
- Creation of raw data files (raw geo-data) according to ZTV-ZEB-StB
References: More than 500,000 kilometres surveyed by our skid resistance measurement system
- 1991 to 2012 - More than 290,000 kilometres measured on federal highways in Germany, and national roads in Italy, Switzerland and the Czech Republic
- 1996 to 2012 - More than 120,000 kilometres measured on state and county roads in Germany, Austria, Poland, France and Switzerland
Skid resistance measurement device:
More information on the skid resistance measurement principle and skid resistance as a condition indicator is available here.
Anmerkungen:
1) ZTV ZEB-StB = Zusätzliche Technische Vertragsbedingungen und Richtlinien zur Zustandserfassung und –bewertung von Straßen