ASSESSMENT OF THE PEDESTRIAN WALKABILITY IN THE URBAN VILLAGE WITH URBAN NETWORK ANALYSIS

Rianti Tiarasari 1, Woerjantari Kartidjo 2 1 Bandung Institute of Technology 2 Bandung Institute of Technology rianti.tiarasari@gmail.com

Urban Retrofitting: Building, Cities and Communities in The Disruptive Era

The 20th International Conference on

Sustainable Environment

& Architecture

Supported By: Organized By: Presenter Affiliation:

INTRODUCTION & LITERATURE REVIEW

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Walkable City Walkablity

Walkability Criteria Network Centrality

Measure Urban Network

Analysis

INTRODUCTION

LITERATURE REVIEW

The purpose of this study was to determine the environmental quality of the urban village (Kampong Tamansari)

based on walkability.

1 2 4 3

The quality of the urban environment

Bandung growingbeyond capacity without city plan.

The Urban Village Phenomenon

(Kampong Tamansari)

Lower middle economic Low environtmental quality

INTRODUCTION & LITERATURE REVIEW

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URBAN NETWORK ANALYSIS UNA is a toolbox from ArcGIS developed by the City Form Research Group at the MIT.

UNA includes three main elements in an urban area, namely edges which represent a path for road users, nodes which represent intersections and buildings that represent the built environment.

The toolboxes can be used to calculate five types of network centrality measures : 1. Reachness 2. Gravity Index 3. Betweenness 4. Closeness 5. Straightness

Figure 1. Represent Building and Nodes

Then UNA also introduced weighted spatial representations on network elements.

Reference: Sevtsuk, 2012

METHODS

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Quantitative analysis with Urban Network Analysis (UNA)

Data of Tamansari

Building data : Function, area, height, volume, weight

Analysis Step

Enter Attribute data into the table

Topological Analysis

Network Analysis

Urban Network Analysis

Pedestrian network : path length, path widh.

Pedestrian network

Figure 2. Tamansari Building Data based on ITBx Table

FINDINGS AND DISCUSSION

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Figure 3 VNBK in Tamansari Area

There are four centrality measures that we will use in this study, namely Reachness, straighness, closeness, and betwenness.

The VNDK represents how much a building affects an environment.

Supporting facilities make the urban village area of Tamansari a fairly high achievement within a radius of 350 m, indicated by the dominance of the results from orange to red in reachness index.

The Betwenness Index results, it shows that the block size is under 190 m which means it is quite pedestrian friendly.

FINDINGS AND DISCUSSION

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1. The straightness results show that the northern kampong Tamansari is more difficult to pass and access compared to the southern part of Kampong Tamansari and is also more confusing in terms of pedestrian orientation (Figure 4).

2. The results of the closeness index show that the number of isolated or dead-end areas is more in the northern part of Kampong Tamansari (Figure 5).

Figure 4. Straightness Index within 350 meter Network Radius from each Building in Tamansari Area. (a) Northern Kampung Tamansari (b) Southern

Kampung Tamansari

Figure 5. Closeness Index within 350 meter Network Radius from each Building in Tamansari Area. (a) Northern Kampung Tamansari (b) Southern Kampung

Tamansari

CONCLUSIONS

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1. UNA can be considered effective enough to be used in assessing environmental quality based on walkability quantitatively for complex environmental cases such as urban villages.

2. Entering building elements and building weights into the centrality network measure makes the analysis results close to the original environmental conditions.

3. UNA cannot accommodate all walkability criteria. Of the six criteria for the conclusion of the walkability literature, only three criteria can be described from the results of the UNA analysis. These criteria are: • Connectivity , connectivity is described from all centrality measure result • Convenience, convenience is describe from the result straighness and closeness • Diversity, diversity described from the reachness result

4. Criteria that cannot be explained from the UNA results are safety, security, and comfort.

REFERENCES

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Thank You

The 20th International Conference on Sustainable Environment & Architecture

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