• Title, Summary, Keyword: TOD

Search Result 171, Processing Time 0.033 seconds

An Empirical Study on the Correlation between TOD Planning Elements and Subway Ridership in Busan Metropolitan City (부산시 역세권 TOD계획요소의 공간특성과 지하철 이용객 수의 상관성에 관한 실증연구)

  • Choi, Don-Jeong;Suh, Yong-Cheol
    • Journal of the Korean Association of Geographic Information Studies
    • /
    • v.17 no.3
    • /
    • pp.147-159
    • /
    • 2014
  • Public transportation ridership and walkability of urban district can be enhanced through high quality of TOD(Transit Oriented Development) elements. Generally, TOD have been evaluated several physical components such as the diversity of land use pattern, accessibility of public transportation and aspects of urban design around the station area. Especially, Spatial characteristics of TOD planning elements have many potential dependent when considering the characteristics of Rail Station-Influenced Area Development which is performing around subway station. Therefore, researchers should be considering the variation of spatial properties for planning elements according the set of spatial area and their socioeconomic factors. However, existing many cases related TOD does not consider about this point. In this paper, the changes of TOD characteristics were analyzed by different spatial units surrounding subway station in Busan Metropolitan City. Multiple Regression Analysis was performed for an investigation of effective spatial unit of TOD planning elements in this area using subway ridership data. In addition, the application validity of socioeconomic variables was examined through a comparative analysis of regression results with the multiple regression that implied only physical TOD elements. As the result, the variation of spatial properties for TOD planning elements according to the set of spatial unit was found. Furthermore, the specific spatial unit to applicable TOD elements in this area was derived. And the multiple regression model which added socioeconomic variables was derived more improved estimate results than the multiple regression model that implied only physical TOD elements.

Optimization of TIME-OF-DAY and Estimation on the Field Application for Arterial Road (간선도로 교차로의 TOD 시간계획 최적화 및 현장적용 평가)

  • Lee, In-Gyu;Lee, Ho-Sang;Kim, Yeong-Chan
    • Journal of Korean Society of Transportation
    • /
    • v.29 no.4
    • /
    • pp.113-123
    • /
    • 2011
  • Traffic signal control is one of the most cost-effective means of improving urban mobility. With the recent progress of ITS (Intelligent Transportation System) and the installation of the real time traffic control systems, traffic signal control is conducted in online and real time. Normally, time-of-day (TOD) signal control is used with the system, but no definite methodology has yet been available for efficient TOD signal planing designing. Such method and process are in need to optimize the traffic signal timing plan. This paper proposes the optimization of TOD signal timings on arterials. The effects of the signal timings from the proposed method were assessed in the field. The proposed includes the methods determining the separation of the TOD break points and the TOD intervals. Those were tested on an arterial consisting of ten coordinated signalized intersections. It was found from the test results that the proposed TOD signal timing plans outperformed the previous signal timings.

A Comparative Analysis of TOD Planning Elements of Major Urban Railway Station Areas in Seoul (환승역세권 평가를 통한 TOD 계획 요소의 비교분석)

  • Lee, Jun-Beom;Jin, Won-Young;Seo, Eun-Young;Won, Jai-Mu
    • Journal of the Korean Society for Railway
    • /
    • v.17 no.3
    • /
    • pp.201-209
    • /
    • 2014
  • Transit Oriented Development(TOD) has been the dominant paradigm for urban development. The traditional approach to the development of urban rail station areas demonstrates apparent weaknesses when it comes to compact and mixed-use types of development for these stations. Thus, the objective of this study is to derive evaluation indicators with which to assess urban rail station areas using TOD planning elements. A focus group interview was conducted to explore TOD planning elements. In order to examine the level of TOD to be achieved, an AHP technique was utilized to analyze the importance of several variables. Z-scores and Re-scores were applied to derive the values for the stations. The Variables related to the land use type, mixed use, floor area, and public transit were found to be the major contributing factors to the achievement of TOD in urban rail station areas. The results of this study show that the level of TOD achievement varies according to the major land use, density, accessibility, and mixed-use planning elements.

A Study on the Location Efficiency and the Development of Transit-Oriented Development Theory (TOD이론의 발전과 입지효율성에 관한 연구)

  • Kwack, Dong-Wha
    • Journal of The Korean Digital Architecture Interior Association
    • /
    • v.12 no.3
    • /
    • pp.27-38
    • /
    • 2012
  • The purpose of this study is to analysis the concept of location efficiency, a base for the qualitative evaluation of TOD, and to propose the method of urban design for the improvement of location efficiency. Because of the environmental crisis by urbanization, sprawl and global warming, the importance of the solution through TOD has been increasing. For the future development of TOD, it becomes important to evaluate TOD qualitatively. From the study, it is grasped that location efficiency contains the concepts of value recapture, QoL and choice, financial return, and efficient regional land use and patterns. And the method of urban design for location efficiency is proposed as the followings: Form Based Zoning as land use plan, TOD and TOC model as node function, and street systems, mixed-use development, characteristic housing with various types, and networking of neighborhood facilities as place function.

An Evaluation of TOD Effect with the Concept of 'Pedestrian Traffic Ratio' ('보행율' 개념을 이용한 TOD 효과 평가)

  • Lee, Sang-Hyun;Fang, Lin
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.20 no.2
    • /
    • pp.763-772
    • /
    • 2019
  • Recently, there is a great expectation for the sustainable effect of TOD and apply it to urban planning and design. However, there are few research on the quantitative evaluation method of the effect. The purpose of this study is to propose a quantitative way to assess the effectiveness of TOD(Transit Oriented Development)'s vehicle traffic reduction in the urban planning phase, based on the land-use plan. Firstly, it proposes a method to convert the information contained in the land-use plan into a network and secondly a method to estimate the travel distance based on the network. In the first phase, the roads in the land-use plan are converted into links and the intersection of the roads into nodes. The area and the height of the zones included in the land-use plan are converted into the weights on adjacent nodes. The second phase assumes the frequency at which travel occurs between nodes on the network is relative to the weights and estimates the travel distance by dividing it into a pedestrian and a vehicle. Then, taking the city without TOD as the object, through comparison present city and alternatively redesigned city to the analysis of TOD effect. In this study, the application of these methods to Bundang as of 1997 and alternatively redesigned Bundang showed that about 39.94 percent of the vehicle traffic reduction effects occurred. Furthermore, the pedestrian traffic ratio of alternatively redesigned Bundang increased to 2.39%.

Identification and Expression of the cym, cmt, and tod Catabolic Genes from Pseudomonas putida KL47: Expression of the Regulatory todST Genes as a Factor for Catabolic Adaptation

  • Lee Kyoung;Ryu Eun-Kyeong;Choi Kyung-Soon;Cho Min-Chul;Jeong Jae-Jun;Choi Eun-Na;Lee Soo-O;Yoon Do-Young;Hwang In-Gyu;Kim Chi-Kyung
    • Journal of Microbiology
    • /
    • v.44 no.2
    • /
    • pp.192-199
    • /
    • 2006
  • Pseudomonas putida KL47 is a natural isolate that assimilates benzene, 1-alkylbenzene $(C_1-C_4)$, biphenyl, p-cumate, and p-cymene. The genetic background of strain KL47 underlying the broad range of growth substrates was examined. It was found that the cym and cmt operons are constitutively expressed due to a lack of the cymR gene, and the tod operon is still inducible by toluene and biphenyl. The entire array of gene clusters responsible for the catabolism of toluene and p-cymene/p-cumate has been cloned in a cosmid vector, pLAFR3, and were named pEK6 and pEK27, respectively. The two inserts overlap one another and the nucleotide sequence (42,505 bp) comprising the cym, cmt, and tod operons and its flanking genes in KL47 are almost identical (>99 %) to those of P. putida F1. In the cloned DNA fragment, two genes with unknown functions, labeled cymZ and cmtR, were newly identified and show high sequence homology to dienelactone hydrolase and CymR proteins, respectively. The cmtR gene was identified in the place of the cmtI gene of previous annotation. Western blot analysis showed that, in strains F1 and KL47, the todT gene is not expressed during growth on Luria Bertani medium. In minimal basal salt medium, expression of the todT gene is inducible by toluene, but not by biphenyl in strain F1; however, it is constantly expressed in strain KL47, indicating that high levels of expression of the todST genes with one amino acid substitution in TodS might provide strain KL47 with a means of adaptation of the tod catabolic operon to various aromatic hydrocarbons.

Purification and Characterization of the N-terminally Truncated DNA Polymerase from Thermus thermophilus HJ6 (Thermus thermophilus HJ6 유래 N-말단 결실 DNA Polymerase의 정제 및 특성)

  • Jeon, Sung-Jong;Seo, Min-Ho
    • Microbiology and Biotechnology Letters
    • /
    • v.38 no.2
    • /
    • pp.158-162
    • /
    • 2010
  • The gene encoding N-terminally truncated Tod polymerase ($\Delta$Tod polymerase) from Thermus thermophilus HJ6 was expressed in Escherichia coli under the control of the lambda pR and pL tandem promoters on the expression vector pJLA503. The N-terminal domain (250 amino acids) of Tod polymerase was removed without significant effect on enzyme activity and stability, while no 5'$\rightarrow$3' exonuclease activity was detected. The $\Delta$Tod polymerase was verified to possess very efficient reverse transcriptase (RT) activity in the presence of $MgCl_2$. The cDNA can also be amplified in the polymerase chain reaction (PCR) with this mutant enzyme. The $\Delta$Tod polymerase was exhibited higher activity than the Taq polymerase in a one-step RT-PCR.

An Empirical Analysis on Public Transportation Demand and TOD Design Factors in Seoul subway adjacent area (서울시 역세권의 TOD환경과 대중교통이용수요 관계분석)

  • Moon, Young-Il;Rho, Jeong-Hyun
    • International Journal of Highway Engineering
    • /
    • v.13 no.4
    • /
    • pp.211-220
    • /
    • 2011
  • TOD(Transit Oriented Development) has recently been active, which presents that TOD planning elements should be comprehensively taken into consideration in order to enhance domestic transit ridership by changing environments in rail station areas and an empirical analysis on the type of rail station areas and transportation demand should be a prerequisite for usage of future development planning. This study aims to grasp a variety of TOD of influence factors in Seoul rail station area and to perform analysis to identify relationship between public transportation demand and these TOD design factors. To make it come true, we gathered data with respect to Density, Diversity, and Accessibility as representative TOD planning elements and carried out factorial and regression analysis. Consequently, we drew 7 influence factors base on factorial analysis: Factor 1(Diversity/ -Use Mix(LUM)), Factor 2(Density/development density), Factor 3(Accessibility/public transportation facility supply), Factor 4(Design/street design), Factor 5(Green/access mode (pedestrian, bike), Factor 6(Design/subway size), Factor 7(Accessibility/Public transit operation) As the result of model development by using factorial and regression analysis, positive influence factors on passenger flow in rail station area are Factor 1(Diversity : Land-Use Mix), Factor 3(Accessibility : public transportation facility supply), Factor 2(Density : development density), Factor 5(Design/ access mode) and Factor 6(subway size) Next, negative influence factor on passenger flow in rail station area shows Factor 7(Accessibility/Public transit operation) as the most influential factor. This is because the growth of service interval of linked subway and bus leads to reduced demand.

Analysis of Technology Opportunity Discovery Activities in the Korean SMEs (국내 중소기업의 기술기회 발굴 활동 현황 연구)

  • Cho, Chanwoo;Lee, Sungjoo;Park, Young-Wook
    • Journal of Korea Technology Innovation Society
    • /
    • v.14 no.spc
    • /
    • pp.1128-1151
    • /
    • 2011
  • With the rapid change in technology, it is important to create business opportunities from technology. Many leading companies have tried to improve their competence from capturing those opportunities, which is called TOD (Technology Opportunity Discovery) activities in this research, by identifying emerging technologies or assessing economic and market potential of technologies. Academics have also been interested in the TOD activities but most of the previous studies have focused on developing methodologies or guidelines for TOD. Little effort was given to understanding the current status of TOD activities, which is indispensible to develop effective methodologies for TOD. Therefore, this study aims to investigate the current states of TOD activities, particularly focusing on SMEs, which are the main actors of national innovation system. For the purpose of investigation, firstly, TOD process was defined, and then, based on the process, three main activities of TOD, which include identifying the motivation of TOD, collecting information for TOD, and analyzing the collected information activities for TOD, were examined using a survey method. Finally, the analysis results were used to understand the SMEs' needs and difficulties on TOD activities. Research findings are expected to provide useful information for the future studies on TOD and also can be used to develop a policy for SMEs.

  • PDF

An Empirical Model for Estimating Bus Boarding and Alighting Time (버스 승하차시간 추정 모형 개발)

  • Seong, Myeong Eon;Choi, Keechoo;Shin, Kangwon;Chung, Woohyun;Lee, Kyu Jin
    • Journal of Korean Society of Transportation
    • /
    • v.32 no.2
    • /
    • pp.152-161
    • /
    • 2014
  • The total boarding and alighting time models have been developed by applying the multiple regression analysis with three variables; numbers of boarding or alighting passengers, non-sitting passengers, and the step-height from the ground. Such variables have influenced to the total boarding time model with the most influential in the numbers of boarding or alighting passengers and the least in the step-height. On the total alighting time model, the numbers of alighting passengers are the most strongest while the step-heights the least. The total boarding and alighting time models can be used in practices for the prediction of current and future bus stops' capacities in TOD-based towns.