Cycling is a sustainable transport mode, especially in urban areas for short distances. Electric bikes and electric scooters are increasingly emerging into traffic network in cities in Sweden due to advantages related to accessibility, environment, etc. However, they bring questions in terms of traffic risk and accidents. The road infrastructure must be adapted to accommodate the increasing share of these new types of bikes in traffic. The study will assess both bikes and e-bikes safety according to exposure, risk and consequences. The study will review relevant literature on Traffic Calming Measures (TCMs). It will develop a conceptual framework to determine the impact of different TCMs (horizontal and vertical) on traffic safety for both traditional and e-bikes safety. Accident data from the Swedish Traffic Accident Data Acquisition (STRADA) will be collected and analysed in order to identify roundabouts (as a chosen type of TCMs) with high accidents rates for cyclists in Norrkoping city in Sweden.