Table 3 Proposed framework for evaluating the SUE model indicators. Source: Author, based on [12, 13, 21]
From: Urban form and economic sustainability in housing projects
Main element | Code | Indicator | How to measure the indicator | Data | M. Unit | Economic Sustainability (ES) | Notes |
|---|---|---|---|---|---|---|---|
Urban fabric | UF | Built-up to total space ratio (solid and void) | UF1 = buildings ratio = total built-up area/total land area | Total built-up area, total land area | Percentage (%) | There is an inverse relationship between UF1 and ES | Compactness index |
UF2 = voids (spaces) Ratio = total voids area (spaces)/total land area | Total space area, total land area | Percentage (%) | There isa positive association between UF2 and ES | Public and private spaces | |||
Land use | LU | Mixed-use ratio | LU = area designated for mixed-use/ total area | Total area, total mixed-use area | Percentage (%) | There is a positive association between LU and ES | Land budget, Entropy index |
Density | D1 | Built-up ratio | D1 = total built-up area of the ground floor for land use/land area | Ground floor area for all uses, total land area | Percentage (%) | There is an inverse relationship between D1 and ES | Footprint |
D2 | Population density | D2 = population/total land area | Population, total land area | Person/acre | There is a positive association between D2 and ES | Residential density | |
D3 | Floor area ratio | D3 = total built-up area for all floors per use/area designated for each use | Built area for each floor, land-use area for each use | Value | There is a positive association between D3 and ES | FAR | |
Circulation and road network | NR | Degree of connectivity and transmittance | NR1 = degree of accessibility in the region (NODES) = number of nodes inside the region (connections) | Nodes, road links | Value | There is a positive association between NR1 and ES | Beta index |
NR2 = degree of accessibility to the outer area = number accessibility points to the main external road | External accessibility points | Value | There is a positive association between NR2 and ES | Outer roads, nodes | |||
PT | Public transportation network | PT = total lane lengths for public transportation/total street lengths | Total lane lengths allocated for transportation, total street lengths | Percentage (%) | There is a positive relationship between PT and ES | Public transport |