Accessibility analysis
Travel times from every neighbourhood to jobs, schools and clinics are computed by walking, cycling, public transport and car, showing who is underserved.
GCRI · 城市与建成环境
Urban and transport engineering is the second method this platform stewards. It designs streets, networks and services that give people safe, affordable access to opportunities, and plans how transport keeps working in floods, heat and other disruptions.
Urban and transport engineering plans and designs cities and the networks that move people and goods. It shapes exposure, accessibility and the ability of communities to function during disruption. In cities and built environment, 关键基础设施 and society and human development, transport analysis identifies critical links whose loss isolates communities or halts supply chains. It informs land use decisions that reduce exposure and maintain access to services. The canonical description is on STEM Commons.
Travel times from every neighbourhood to jobs, schools and clinics are computed by walking, cycling, public transport and car, showing who is underserved.
Crash locations are analysed with street design and speed data to identify treatments such as lower limits, safer crossings and protected lanes.
Road and transit links are checked against flood maps, and drainage and alternative routes are designed for the links that flood most often.
印度的夜间灯光、人口密度和白天地表热量,来自 NASA GIBS。每个图层均标有各自日期。
交互式地图需要JavaScript;图层列表和来源见下文。
图层 3
本页的城市信号
键盘操作,地图获得焦点时
按住 Ctrl 或 ⌘ 并滚动以缩放
最新可用
NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap贡献者 (ODbL) · Natural Earth
正在加载最新的NASA影像。
拖动以移动。按住 Ctrl 或 ⌘ 并滚动、双指缩放或使用按钮缩放;悬停可查看指针下的数值;重置可返回该区域。
城市信号,以印度为取景。NASA 发布的卫星和模型产品,各带自己的日期。它们是指标,而非对任何地点的评估。
图层与日期
Datasets and records used by urban and transport engineering on this platform, with the role each plays and the label its values carry. Sources are listed in 来源登记册.
| 数据 | 角色 | 标签 |
|---|---|---|
| GTFS feeds and OpenStreetMap | Networks and schedules | 观测 |
| Crash records | Safety analysis | 已发布统计 |
| Travel surveys | 需求 | 已报告 |
| Flood hazard maps | 风险暴露 | 模型生成 |
团队遵循该方法时会使用的界面:其指标、状态与决策。名称为示例,数值仅作示意。
Cities · Urban transport engineering · Run R-4072
nodes: assets · edges: dependencies
| N3 | 0.31 | 12 | Critical |
| N4 | 0.18 | 13 | 正常 |
| N5 | 0.16 | 5 | 正常 |
| N6 | 0.19 | 9 | 正常 |
Models are calibrated to observed flows and validated against independent counts. Post-event observations of network performance test resilience assumptions.
| 核查 | 如何开展 |
|---|---|
| Schedule versus operation | Accessibility based on schedules is compared with observed travel times |
| Crash data completeness | Police records are compared with hospital data where possible |
| Equity analysis | Results are disaggregated by income, gender and disability where data allow |
Behaviour during emergencies differs from routine travel. Long-term land use responses to infrastructure are uncertain.
A 危害足迹 会摧毁每一层中位于同一位置的资产;随后,碎片化、层间依赖以及幸存部分的过载会使失效蔓延。3D 视图按深度分开各层。这是附有明示示意值的教学模型,不是预测。本页地图显示的是印度;模型本身不依附于某个地点。
控制措施
读数
| 步骤 | 交通运行(%) | 电力运行(%) | 电信运行(%) |
|---|---|---|---|
| 0 | 89 | 83 | 100 |
| 1 | 44 | 56 | 100 |
| 2 | 39 | 17 | 83 |
| 3 | 39 | 11 | 61 |
| 4 | 33 | 11 | 33 |
| 5 | 28 | 11 | 28 |
| 6 | 28 | 11 | 11 |
The model runs on the teaching values set by the controls. To calibrate it for a place, read it against these admitted layers and series, which this page’s map can draw:
贯穿六大支柱,由 Nexus Consortium 牵头
Assembled from the Nexus Standards area profile 城市与建成环境: the hazards it names, the 系统 and sectors that carry the loss, the controls that dampen it and the data that observe it. Choose the components, pick an initiating hazard and step through the cascade. The Map view places the run on an example geography with open data. Every coupling weight is a stated assumption you can change. A teaching model, not a forecast, an assessment or a certification. To model a place of your own choosing, open the full System Builder.
灾害
控制措施
NS-0 章程与原则NS-3 风险记录 UNI(语法、旧编码对照、分配机构)NS-5 图表、地图和可视化标准(配合 UI/UX 套件)NS-9 情境 UNI(部署、实例、计划实例)NS-10 政策和条款(机器可读的义务:定义、约束、评估和执行)NS-11 验证与监测(证据、证明、零信任符合性观测)NRS-X5 城市与建成环境风险NRS-H91 危害族:城市与建成存量压力(NHS-1 infra.urban)NRS-H113 危害类别:金融体系脆弱性(NHS-1 soc.financial-system)NRS-K7 领域包概况:城市(DOMAIN-007)NRS-H31 危害类别:持久性和生物累积性物质(NHS-1 poll.persistent)NRS-H34 危害类别:废物与残余物处置失效(NHS-1 poll.waste)观测
示例地理范围
Cities and Built Environment stewards urban and transport engineering for the Consortium and reviews how it is applied across platforms.
模型、其假设、数据和不确定性,以科学家或工程师会核查的形式呈现。结构遵循已发表的方法。所取数值仅为示意,不是研究发现。
The couplings between the systems in urban transport engineering: signs of influence, a reinforcing and a balancing loop, and cross-links where stress jumps.
报告 is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
切勿发送个人数据、敏感基础设施细节或您无权分享的任何内容。贡献在使用前会经过审查;发送贡献不赋予署名权或编辑权,赞助也绝不能换取研究结论。
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