An information retrieval arrangement for a host vehicle is configured to retrieve information of at least one surrounding vehicle, surrounding the host vehicle. The arrangement includes a registration plate reading arrangement configured to read registration plate information of a surrounding vehicle and an information retrieving unit configured to retrieve from a database at least one dimension of the surrounding vehicle, based on the read registration plate information. A method of retrieving information of at least one surrounding vehicle using an information retrieval arrangement is also disclosed, as well as a lane change assist arrangement including an information retrieval arrangement, and a vehicle including an information retrieval arrangement.