In the 90's the establishment of external trade centers had a strong growth in Sweden, primarily in large and medium cities. Gradually took smaller towns by this development. In larger cities with larger and growing customer base than in small towns were not affected by the trade centers heavily, but in the smaller towns where the customer base was smaller, there was a risk that it created a negative competitive relationship between external trade center and trade in the citycenter. In some cases, competition is a positive development for both the citycenter and external trade areas, but in some cases there was a risk that the center became impoverished. In such situation there are theories that the different variety of different types of goods should be at the center and in external trade center could lead to a balanced trade relationship. Otherwise, customers may come to replace their consumption in the citycenter with consumption of external trade center. The external trade center in Strängnäs called Solberga trade center. There are plans for Solberga trade center to grow their business. Solberga trade centre is located approximately 5 kilometers from the city center.  There are living many people in Strängnäs today, that need good accessibility to Solberga trade centre and the citycenter, for instance many elderly people with limited ability to move. Lower accessability in terms of distance could create social groups in the city. This can be countered by other attractive activaties in the city Centre. Many that require good accessibility to trade lives in Strängnäs. When supply and attractions in other areas than the trade in the citycenter, this may promote social inclusion in the center that can counteract social segregation. Strängnäs has an advantageous geographic location, with the strong labor market regions around Stockholm area allowing Strängnäs has a large proportion of people living in the city who commute to Stockholm and other larger towns for work. The city also has a unique history, an increase in population and a high proportion of elderly population, which means that the city has the potential for both positive trend with an external trade center and a vibrant city center. To help it should also seek to separate the sale of concealing goods and groceries at various locations. It should also increase the availability of special non-motorists to external trade Centre and bet on the "idyllic" pedestrian area in the center. The role of the municipality with their power to control the use of the ground is important and can be used to adjust the external trade development to Strängnäs development I other areas such as population growth and effects on the trade in the city centre.