Skid Resistance Measurement System

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

• Skid resistance
• Right-of-Way images
• Macro texture

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.