The Use and Evaluation of TDRs in a Developed City
Focus on the Floor Area Bank and the Dihua Street TDR in Taipei, Taiwan
2020 Volume 7 Pages 132-150
Details
2020 Volume 7 Pages 132-150
The transfer of development rights (TDR) has been used to resolve issues concerning developed areas in the city of Taipei, Taiwan for decades. Herein, we pick up floor area bank (FAB)-TDR (as the existing urban plan [UP]-TDR) for dealing with the issue of public facilities' reserved land and the Dihua Street (DS)-TDR, which was established for the preservation and restoration of historical buildings for case analysis. We clarify the characteristics and issues of the FAB-TDR and DS-TDR by performing statistical analyses of the existing operational data to determine the outcomes of these two TDR methods and compare them with the outcomes of the existing UP-TDR.
We propose several indicators for evaluations of the achievement of a TDR from the viewpoints of both the sending sites and the receiving sites. Our comparison of the achievements of FABTDR, UP-TDR and DS-TDR based on the sending floor areas revealed that the amplification ratio decreased to 204% from 327% by FAB-TDR, and a significant effect on the reduction of the excessive amplification of floor area occurred. However, the ratio of DS-TDR was 136% and might be the most effective TDR for the total volume control for the entire city of Taipei.
Our findings suggest that although a TDR can be an effective tool for resolving diverse issues such in a developed city, it is important to regulate and guide the amplification of floor areas into desirable receiving sites and locations based on a city-wide total volume control strategy, to avoid generating excessive floor areas.
