An information retrieval arrangement for a host vehicle , said arrangement being configured to retrieve information of at least one surrounding vehicle , surrounding said host vehicle , said arrangement comprising: - a registration plate reading arrangement configured to read registration plate information of said at least one surrounding vehicle , where the arrangement further comprises: - an information retrieving unit configured to retrieve from a database (11.1, 11.2) at least one dimension (w, l 5 ) of said at least one surrounding vehicle , based on said read registration plate information, and being characterized in comprising: - a surrounding vehicle monitoring unit (15.1, 15.2) configured to detect presence of, and distance (d 5 ) to, a first preceding vehicle and presence of, and distance (d 6 ) to, a second preceding vehicle , where said information retrieving unit is configured to retrieve from said database (11.1, 11.2), a length (l 5 ) of said first preceding vehicle based on read registration plate information of said first preceding vehicle and where said arrangement further comprises a calculating unit configured to calculate a distance (d 5,6 ) between said first preceding vehicle and said second preceding vehicle by subtracting said distance (d 5 ) to said first vehicle and said length (l 5 ) of said first preceding vehicle from said distance (d 6 ) to said second vehicle .. - a registration plate reading arrangement configured to read registration plate information of said at least one surrounding vehicle , - an information retrieving unit configured to retrieve from a database (11.1, 11.2) at least one dimension (w, l 5 ) of said at least one surrounding vehicle , based on said read registration plate information, and being characterized in comprising: - a surrounding vehicle monitoring unit (15.1, 15.2) configured to detect presence of, and distance (d 5 ) to, a first preceding vehicle and presence of, and distance (d 6 ) to, a second preceding vehicle , where said information retrieving unit is configured to retrieve from said database (11.1, 11.2), a length (l 5 ) of said first preceding vehicle based on read registration plate information of said first preceding vehicle and where said arrangement further comprises a calculating unit configured to calculate a distance (d 5,6 ) between said first preceding vehicle and said second preceding vehicle by subtracting said distance (d 5 ) to said first vehicle and said length (l 5 ) of said first preceding vehicle from said distance (d 6 ) to said second vehicle .. - a surrounding vehicle monitoring unit (15.1, 15.2) configured to detect presence of, and distance (d 5 ) to, a first preceding vehicle and presence of, and distance (d 6 ) to, a second preceding vehicle , where said information retrieving unit is configured to retrieve from said database (11.1, 11.2), a length (l 5 ) of said first preceding vehicle based on read registration plate information of said first preceding vehicle and where said arrangement further comprises a calculating unit configured to calculate a distance (d 5,6 ) between said first preceding vehicle and said second preceding vehicle by subtracting said distance (d 5 ) to said first vehicle and said length (l 5 ) of said first preceding vehicle from said distance (d 6 ) to said second vehicle .. <EOS>