I denna uppsats görs en fördjupning utbyggnaden av Stockholms tunnelbana till Nacka kommun. Syftet med uppsatsen har varit att undersöka huruvida det uppstår förändringar i fastigheters värde i nära och direkt anslutning till ny- eller utbyggd tunnelbana. Teorikapitlet behandlar olika teorier som beskriver varför vissa typer av fastigheter och verksamheter uppstår på vissa ställen. Teorin tar sats ur von Thünens sätt att förklara markanvändning. Uppsatsen går igenom hur betalningsviljan för mark dels skiljer sig mellan olika verksamheter och dels hur den avtar med avståndet från Central Business District (CBD). Kontor och handel har relativt sett högre betalningsvilja för fastigheter nära CBD än bostäder och bostäder har högre betalningsvilja än industrier. Med ökad tillgänglighet tack vare tunnelbana så uppstår fler unika områden (lokala CBD:s) där kontor och handel har större vilja att etablera sig. Tack vare ökad tillgänglighet och därmed ökat marknadsvärde så kan vi enligt Tobin’s Q förvänta oss ökad exploatering. Vidare analyseras 15 akademiska artiklar på ämnet. De artiklar som legat till grund för att bedöma värdeförändringen har studerat rapid transit system och genomfört analyser på försäljningsdata. Den genomsnittliga ökningen visar på att värdena för fastigheter går upp med 9,6 %. Artiklarna ger också en relevant input om eventuella yttre negativa omständigheter (som dock inte överstiger nyttorna) som uppstår med tunnelbana, till exempel ökad kriminalitet. Deltagarna i enkätundersökningen förväntar sig att alla typer av fastigheter värdemässigt kommer påverkas positivt inom en radie av 1 kilometer. De anser att det till en viss grad finns en marknad för privat medfinansiering samt att medelklassområden är de områden med högst betalningsvilja för tunnelbana. / This thesis delves deeply into the expansion of the Stockholm subway to Nacka municipality. The purpose has been to investigate whether there is a change in the valuation of properties in close proximity to new or expanded subway. The theory chapter covers different theories on land use and bid rent curves. The theories are based on von Thünen’s way of describing land use. The thesis goes through how the willingness to pay for land on one hand differs between different property types and on another hand decreases with distance to Central Business District (CBD). Offices and retail have a relatively higher willingness to pay for land in the proximity of CBD than residential and residential have a higher willingness to pay than industrial. With increased availability thanks to subway come numerous unique areas (local CBD’s) where office and retail have a higher willingness to establish. The increased availability also heightens the Tobin’s Q, which means we can expect a higher degree of exploitation. 15 academic papers that cover the issue are analyzed. The articles which are the basis for the reasoning on value change have studied rapid transit systems and conducted analysis on sales data. The average increase in property value of 9,6 %. The articles also gives good input on negative externalities (which however never exceeds the benefits), for example increased criminality. The participants in the survey are expecting that all types of properties will increase in value within a radius of 1 kilometer from the stations. They consider that there is a potential market for private co-financing and that middle-class areas are the ones with highest willingness to pay for subway.

Purpose: The purpose of this study is to investigate and analyze whether the current platform elements can handle the additional loads from the introduction of platform screen doors at various subway stations. The specific stations involved in the study were Norsborg, Alby, Fridhemsplan, Globen and Alvik. Method: By introducing the platform screen doors, the number of potential accidents is minimized, and the safety of passengers is increased. In order to see if the platforms would be capable of handling the extra load from the platform doors, engineers have measured the thickness of the current platforms to see whether they would be able to withstand the additional pressure that comes with the installation of platform screen doors. Results: Based on the calculations of the different platform types, the results show that platform type 1 can not handle loads from the platform doors and has to be reinforced to minimize the risks of breakage and tilting. Platform types 2 and 3 can manage the weight from the platform doors but should also be reinforced since there is a risk that they will break in the future. In order to achieve safety for people on the platform, the results show that a half-high platform door is the best choice. Conclusions: The available manufacturers on the market offer some different models of platform screen doors, both full and half-height. Since stations and their platform elements vary in design and quality, it is not the optimal choice to have the same type of doors on all stations. The best choice for indoor stations is to install full height screen doors where it is possible. Although, half-height screen doors can be installed on all stations. The half-height screen doors result in the most consistent performance while maintaining the safety of people on the platform.