Traffic Calming and Safety Installations

Inventory of street features that are installed on streets for traffic calming and safety enhancements. Data Glossary Click here to view table and field information. Description Installations are categorized by status, where existing installations are present on the street. In progress installations are funded and have a date set for construction. The dataset includes several types of traffic calming or safety installation, including: Speed table: vertical bumps in the road that cause drivers to slow down to drive over them. Speed tables are relatively flat on the top and are not as abrupt as speed bumps, which are narrower and rounded. Roundabout: an intersection where traffic moves in one direction around a central island to reach a converging street Mini-roundabout: a roundabout with a mountable central island Pedestrian refuge island: a physically separated median segment in the roadway connecting a crosswalk to either side of the street; intended to help protect pedestrians who are crossing a multilane road Curb extension: an extension of the sidewalk or curb line out into a parking lane, shortening the pedestrian crossing distance and increasing visibility Update Frequency Annually, typically at the end of Fall This dataset is featured in the following stories/apps: Safe Streets for Clevelanders Contact Calley Mersmann, Senior Strategist, Transit and Mobility, [e-mail]本数据集为面向街道交通缓行与安全提升的街道设施清单。 数据术语表：点击此处查看表格与字段详情。 数据集说明：设施按部署状态分为两类，「已安装」指设施已铺设于街道；「施工中」指设施已获得资金支持并确定施工日期。 本数据集涵盖多类交通缓行或安全设施，具体包括： 1. 减速台（Speed table）：路面凸起结构，迫使驾驶员减速通过。其顶部相对平坦，与更窄、呈圆弧状且顿挫感更强的减速带（Speed bump）有所区别。 2. 环形交叉口（Roundabout）：车辆沿中央环岛单向行驶以汇入相邻道路的交叉口。 3. 微型环形交叉口（Mini-roundabout）：中央环岛可供车辆碾越的环形交叉口。 4. 行人安全岛（Pedestrian refuge island）：车行道内物理隔离的中央区段，连接人行横道与街道两侧，用于为横穿多车道道路的行人提供安全庇护。 5. 路缘延伸（Curb extension）：将人行道或路缘线延伸至停车带内，可缩短行人过街距离并提升驾驶员视野。 更新频率：每年一次，通常于秋季末完成更新。 本数据集曾应用于以下报道与应用项目：克利夫兰市民安全街道计划（Safe Streets for Clevelanders）。 联系方式：交通与出行高级策略师卡莉·默斯曼（Calley Mersmann），电子邮箱：[e-mail]