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The mi-PW friction tester as an element of road surface skid resistance evaluation system at the traffic accident scene

Luty W.

Journal of KONES

2011

Vol. 18, No. 1

333-342

Conclusions regarding needs related with building of measurement device, used to road surface skid resistance evaluation in traffic accident scene, are presented in this paper. Review results of devices and testers used to road evaluation of road surface properties, which are responsible for tire-road grip coefficient, are presented. Methods of road surface skid resistance measurement have been evaluated, in the context of common use in the process of traffic accident scene description. In the case of portable devices there are generally indirect methods, using rubber specimen which is sliding on the road surface, under certain normal load. In such cases, the measurement results defined as friction coefficient can be correlated with a tire grip coefficient to the road surface. There has been shown that it is necessary to develop methods and technical means of road surface skid resistance evaluation, which ensure an increase a results reliability of road accidents reconstruction process. Assumption for building and design system of mi-PW tester, have been presented. Established device concept is based on the measurement of the rubber specimen friction coefficient to the road surface. During the measuring the specimen normal load is fixed and motion speed is controlled. Features of tester and possible modes of measure, have been shown. An important feature of the tester is the possibility of transfer measurement results to a computer in order to prepare of test report, as an annex to the Police report of the vehicle inspection, used by the police in the procedure of traffic accident scene describing.

Prawno-techniczne aspekty oceny przyczepności nawierzchni drogi w miejscu zdarzenia drogowego

Luty W.

Logistyka

2010

nr 4

CD-CD

W pracy przedstawiono analizę obecnego stanu zagadnienia w zakresie oceny i dokumentowania właściwości nawierzchni drogi w miejscu zdarzenia drogowego. Szczególną uwagę zwrócono na sposób określania tych właściwości nawierzchni drogi, które odpowiadają za przyczepność kół jezdnych samochodu do podłoża. Dokonano oceny obecnych sposobów oceny przyczepności nawierzchni drogi, które mogą być stosowane w miejscu zdarzenia drogowego. Wskazano na potrzebę rozwijania metod i środków technicznych oceny przyczepności nawierzchni drogowej, które zapewnią wzrost wiarygodności procesu rekonstrukcji zdarzeń drogowych.

An analysis of current issue in scope of making evidence documentation about properties of road pavement in place of traffic accident is presented in this paper. Especially there were focused on method to determine these road pavement properties, which are responsible for its frictional resistance in interaction with car tired wheels. General evaluation of current methods to determine road frictional resistance, used in traffic accident places, was made. There were indicated that it is still needed to develop of methods and technical means for road frictional resistance evaluation, which can provide reliability growth of traffic accident reconstruction process.