Public transport use and spatial developments have always influenced each other. During the last decade governments are more and more trying to get grip onto this process via different types of policy tools. One of these tools is Transit Oriented Development (TOD). In TOD the use of existing and new public transport network is stimulated by building new residential areas close to these networks. Since there are other influence factors as well, Transit Oriented Development is not always a success. This study identifies these factors and quantifies them using the Dutch transportation model NRM (Nederlands Regionaal Model. Different spatial developments and public transport network adjustments for the Randstad south wing (called StedenbaanPlus) are combined and per influence factor molded into different NRM scenario's. The results are as expected; the largest influences found on public transport use are indeed the spatial developments, the economic situation and the quality of the transit system itself. Other effects are relatively small, but not negligible. Final conclusion is that StedenbaanPlus is feasible for some projects and the overall effect is that TOD can lead to an additional demand for public transport of up to 20%.