Dynamic Evaluation on the Traffic State of an Urban Gated Community by Opening the Micro-Inter-Road Network

Dong, Lin; Rinoshika, Akira; Tang, Zhixian

doi:10.3390/technologies6030071

Cited by 5 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are some different approaches on the impact and benefits of opening policies. For instance, Dong et al [ 30 ] approached the issue with a focus on its benefit for relieving the traffic burden. Their results showed that an opening policy will help decrease traffic congestion around gated community sites.…”

Section: Literature Reviewmentioning

confidence: 99%

Opening Gated Communities and Neighborhood Accessibility Benefits: The Case of Seoul, Korea

Dogan

Han

Lee

2021

IJERPH

View full text Add to dashboard Cite

The level of spatial accessibility is directly related to how street networks are connected. Connected or so-called “permeable” network systems encourage walking, cycling, and riding public transit. Fast urbanization during the recent decades in the world metropolises has created separated urban areas. Gated-style apartment complexes have led this segregation more obviously with their inaccessible internal networks. Opening the internal network of apartment complexes and redesigning the pedestrian paths among apartment buildings will significantly mitigate these networks’ adverse effects on network permeability and increase spatial accessibility. This paper analyzes how such an opening design proposal for apartment complexes can change spatial accessibility using the case study of Mapo-gu, Seoul, Korea. It simulates three types of street networks and compares the results of accessibility in three conditions: (1) the internal networks of apartment complexes are not used by outsiders; (2) the internal networks of apartment complexes are open to outsiders with its existing entrances and path; and (3) the internal networks of sites are opened and redesigned by the Voronoi diagram method, which generates the optimal shortest path. An urban network analysis tool, Rhinoceros three-dimensional software, and Grashopper3D visual programming language have been used for the study results, which shows that a policy change in opening the intra-network of apartment complexes is likely to make the city more permeable. In addition, this study suggests extra modification on the pedestrian path for a higher level of accessibility in neighborhoods.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Opening Gated Communities and Neighborhood Accessibility Benefits: The Case of Seoul, Korea

Dogan

Han

Lee

2021

IJERPH

View full text Add to dashboard Cite

show abstract

“…To be more specific, GCs provide huge challenges to the traditional porosity and democracy of the street [21], which triggers the method of opening the gates and reconnecting the roads. Not only can openness erase the traffic congestion by expanding the micro-road network [33], it can also increase the overall connectivity and accessibility of the current road network and alleviate the urban traffic problem [34].…”

Section: Debates About Gated Communitiesmentioning

confidence: 99%

Evaluating Accessibility Benefits of Opening Gated Communities for Pedestrians and Cyclists in China: A Case Study of Shanghai

2021

View full text Add to dashboard Cite

Opening gated communities (GCs) has been widely discussed for urban inclusion and revitalization. With the policies of opening GCs being promoted in China, the quantitative and comprehensive evaluation of the potential benefits is heavily needed. Taking Shanghai as an example, this study quantifies and analyzes the accessibility benefits and risks of opening GCs for pedestrians and cyclists considering two GC types, two opening levels, two travel modes, and different facilities. We found that (1) opening GCs can bring 50 m+ accessibility gains to 17% and 52% of the residents in moderate opening (MO) and complete opening (CO) scenarios, respectively. (2) Cyclists benefits more than pedestrians in all scenarios. (3) Conventional GCs have fewer benefits in MO but more in CO than newly established ones. Trips to bus stations demonstrate the largest accessibility gains. (4) The accessibility benefit of a residential building is highly determined by its closeness to the gates and relative location in the block. (5) Only 1% and 5–7% of external trips may penetrate the opened communities in MO and CO scenarios, respectively, which are far less than both the expectation and the benefits. Finally, several local design guidelines are proposed.

show abstract

“…In essence, open blocks are an increase in the supply of transportation resources. Dong et al proposed that after opening the closed blocks, the density of the road network will be improved and the road area can increase, a result of which the road traffic capacity is naturally improved [23]. Zeng et al proposed that open blocks have a significant effect on the improvement of network performance and capacity and found that breaking "large blocks" and developing small-scale blocks can help to alleviate traffic pressure [24].…”

Section: A Literature Reviewmentioning

confidence: 99%

A Bi-Level Multi-Objective Optimization Model for Micro-Circulation Road Networks in the Open Block Area Considering Traffic Pollution and Intersection Delays

Wang

2021

IEEE Access

View full text Add to dashboard Cite

It is important for urban traffic micro-circulation to improve the density of urban branch road networks by opening roads inside blocks. To reasonably optimize the micro-circulation road network in the open block area, a bi-level multi-objective programming model that considers traffic pollution and intersection delays was developed. In this paper, the goals of minimizing traffic pollution and total travel cost are added to the upper-level programming model and the user equilibrium assignment model with the consideration of intersection delay was presented as the lower-level programming model. A modified genetic algorithm (GA) embedded with the Frank-Wolfe algorithm was designed to solve the established model. The traffic conditions of arterial roads and micro-circulation branch roads before and after optimizing the micro-circulation block road network were compared and analyzed by a numerical example. The results demonstrated that the bi-level programming model can effectively determine the traffic direction of branch roads and the forbidden situation of intersections in the micro-circulation network. Compared with the closed block, the average saturation of the main trunk road decreased from 0.97 to 0.83 with a decline ratio of 14.43% after optimizing the micro-circulation network in the open block area; the average saturation of the secondary trunk road decreased from 0.86 to 0.77, with a decline ratio of 10.47%. The travel time cost decreased by approximately 6.55%, and the traffic pollution decreased by approximately 3.40%, which verified the optimization effect of the model and the algorithm.INDEX TERMS Urban traffic micro-circulation, open block, road network optimization, bi-level multiobjective programming model, genetic algorithm.

show abstract

Dynamic Evaluation on the Traffic State of an Urban Gated Community by Opening the Micro-Inter-Road Network

Cited by 5 publications

References 10 publications

Opening Gated Communities and Neighborhood Accessibility Benefits: The Case of Seoul, Korea

Opening Gated Communities and Neighborhood Accessibility Benefits: The Case of Seoul, Korea

Evaluating Accessibility Benefits of Opening Gated Communities for Pedestrians and Cyclists in China: A Case Study of Shanghai

A Bi-Level Multi-Objective Optimization Model for Micro-Circulation Road Networks in the Open Block Area Considering Traffic Pollution and Intersection Delays

Contact Info

Product

Resources

About