Research of the impact of bumps on vehicle speeds.

The paper presents the results of research on the impact of selected types of speed bumps, located in the streets of the city road network, on the instantaneous speed of passenger cars in free flow traffic conditions. The research considered different speed bumps. All types of speed bumps occurred to be very effective in a traffic calming. The applied parametric tests of a statistical significance showed that, for the sake of mathematical statistics, the differences in the instantaneous speed of vehicles at the speed bumps are significant in relation to the instantaneous speed of vehicles on the inter-junction sections. The instantaneous speeds of passenger cars at speed bumps were over 60% lower in relation to the speeds achieved by drivers of those cars in the inter-junction sections. [ABSTRACT FROM AUTHOR]