Abstract
As part of the SILENCE-project (WP H), an investigation on the effect of crossings and roundabouts on driving patterns and noise emissions was performed.A fully instrumented passenger car was driven through 7 different configurations of crossings and roundabouts. The crossings included both T and X-types. With one driver, 3 different driving styles were used through the crossings; aggressive, normal (for this driver) and eco driving. The measurements were done without any possible influence of other traffic, so only the geometric lay-out of the crossings was varying.The speed of the car, the rpm and acceleration rates were recorded through the passage and used as a basis for calculation of noise emission levels; LAeq, based on engine and rolling noise levels. The TÛV Nord (Germany) noise emission model, TraNECam/Rotranomo, was used for the calculations.The main results show that an aggressive driving behaviour can lead to LAmax-levels about 9 dB(A) higher than eco driving. The LAeq-levels are 1-2 dB(A) higher for crossings compared to roundabouts, if the average speed is the same.
