In this report, the results of the activity 2 of the SUA project are presented. Case study: Evaluation of a set of Spanish municipalities from different sizes. This document is based on the detailed analysis of the situation of the traffic accident (TA) data collection and analysis police procedures in several Spanish municipalities. Likewise, it has been considered, for some municipalities, several actions of improvement of such systems carried out in the general framework of the SAU project and/or of specific agreements with the different municipalities. The cities included are: Barcelona (Large municipality: 1.527.000 inhabitants), Valencia (Large municipality: 761.800 inhabitants), Murcia (Medium-sized municipality: 377.900 inhabitants), Elche (Medium-sized/small municipality: 207.163 inhabitants), Castellón (Medium-sized/small municipality: 163.088 inhabitants). At the methodological level, the work approach varies according to the particular circumstances of each municipality and of the type of collaboration that is established, in a line that goes from the implementation of works and concrete interventions in some municipalities to, at the other end, the mere obtaining of detailed information on the situation in the municipality. Nevertheless, several fundamental elements are raised as excellent: a) Study of the accident data system: Definitions and rules, computer support, working procedures, types of questionnaires, type of data and output exploitation, etc. b) Analysis of the accident data quality and application and validation of procedures of data quality evaluation: Control of univariate and bivariate distributions; deterministic or logical contrasts - tests to detect impossible or incompatible data - and approximate tests (empirical or probabilistic), of which objective is to locate very little probable data. The lack of representativity will be tried to determine through "indirect" indicators like could be particular "anomalies" in the annual disty) according to the different variables (age, severity) always compared to "typical" reference standards established at the national and international level. c) Meetings with experts and technicians of each municipality. Evaluation of experts, in collaboration with the municipal technicians, referring the proceedings, computer tools and analysis outputs now is use.