A three day test was conducted on IceMakers test site Lake Kakel, Arjeplog. There were six different types of measuring devices tested: - Three types of devices that continuously measured and logged road grip. - Two different devices measuring road grip through brake tests, one using an installed instrument and the other using data from the safety systems. - One device based on GPS data and three axis inertia measurements. Amongst the continuous devices one type, the RT3s used regular winter tires of friction type. The other two types used Trelleborg Unitester 520 and 523, industrial tires with regular rubber. Test runs were performed and road grip were recorded on four different surface types: - New System 2000 ice, a freshly prepared ice surface with grated furrows created with System 2000, to create a macro- and micro rough surface. - Old System 2000 ice, where the ice has been aged through weather and wear to micro smoothness while still being macro rough. - Brushed old polished ice, old polished ice that has been snow covered and then brushed off, giving a macro smooth and micro rough surface. - Polished ice, this ice is prepared through either flooding or with a Zamboni ice machine. This surface is both micro- and macro smooth. Only available on March 19th 2008. The weather situation during the three days was stable and weather data was collected throughout the road grip measurements. Alternative URL: http://fudinfo.trafikverket.se/fudinfoexternwebb/Publikationer/Publikationer_001401_001500/Publikation_001444/RT3_ROAD_GRIP_PROJECT.pdf