Between the years 2005 and 2015 cars and trucks have increased with 7, 7 percent inGothenburg. This will mean that in 2035 there will be 47 140 more vehicles. 70.000 of the550.000 people in Gothenburg is being exposed by a noise that is over the limit of 55 dBA. Vehicles incomplete combustion of hydrocarbons leads to a number of additional health problems. According to the Swedish transport department, closer to 3000 people dies prematurely in Sweden each year due to traffic air pollution.A measure to prevent and reduce the intense traffic involves emission requirements, congestion and traffic regulations. The city center of Gothenburg will on the first of October 2016 introduce a prohibition for heavy traffic around the area close to Domkyrkan between 11am - 05am a clock. The purpose of this study has been to investigate if a regulation of heavy traffic can be used as an instrument to contribute to a sustainable and environment adjusted city without affect the residents feeling of an attractive city center. On behalf of the municipal entity Traffic office Gothenburg City and the organization Innerstaden Göteborg a customer satisfaction index analysis (CSI) has been done. Performed in order to measure customer satisfaction before the regulation. The CSI model which is a result from this paper will be re-used after the regulation in order to identify the effects of the traffic regulation. CSI is a statistical method built upon indicators (questions) and latent variables (quality factors) related to a set of indicators. CSI is measured by the respondents answering questions through a 1-10 point scale where 1 is the lowest rating and 10 is the highest ratings. There are three standard questions which average rating creates the CSI value: How satisfied are you with the overall environment as it is today? How well meets the environment your expectations? How well relate this specific area with an ideal inner city environment?