National Sidewalk Inventory · 2023 → 2026

怎麼解讀：三年間全台人行道總長度成長，但路緣斜坡的缺口率不減反增：代表新增或重新盤點的人行道路段，斜坡設置速度沒有跟上路網擴張的速度。「有沒有人行道」和「這條人行道能不能讓輪椅、嬰兒車、視障者安全通過」，是兩個不同的問題。How to read this: total sidewalk length grew over three years, but the curb-ramp gap rate rose, not fell — ramp installation hasn't kept pace with the expanding network. "Is there a sidewalk" and "can a wheelchair, stroller, or visually-impaired pedestrian actually cross safely" are two different questions.

2026 年 6 月路網（實際多邊形範圍，幾何經 ±0.3 公尺簡化）。放大後滑過任一段可看路名、寬度、淨寬與斜坡數；點擊路段即開啟街景比對：街景為主畫面、地圖縮至右上角，小地圖上的小人與視角錐標示實際全景位置與朝向：在全景內拖轉、前進時會即時跟動；「↻ 旋轉 90°」可快速換邊看。資訊列顯示影像拍攝日期；街景取該點最新一輪官方拍攝（若 Google 服務無法載入，會自動退回精簡嵌入模式，該模式下視角錐僅跟隨旋轉鈕）。資料依縣市按需載入（0.03–6.2 MB／縣市）。June 2026 network (actual polygon extents, geometry simplified within ±0.3 m). Zoom in and hover a segment for road name, width, clear width and ramp count; click a segment to open Street View comparison — the panorama takes the stage and the map docks top-right, with a pegman + view cone marking the true panorama position and facing — they follow live as you drag or walk inside the panorama; "↻ Rotate 90°" flips sides quickly. The info bar shows the imagery capture date, and the panorama uses the newest official pass at that spot (if Google's service fails to load, a lightweight embed takes over, where the cone follows the rotate button only). Data loads on demand per county (0.03–6.2 MB each).

⚡ 電線桿圖層：台電桿籍資料（全國約 273 萬支，TWD97 座標轉換；本島 121 分帶、離島 119 分帶），開啟後放大至街區尺度（zoom ≥ 16）顯示視窗內桿位。電線桿常立於人行道上，是輪椅與嬰兒車的實體障礙：與淨寬著色對照可看出「帳面有人行道、實際過不去」的路段。注意：屏東縣桿籍近乎缺漏（僅 88 筆）；桿位為台電登記位置，可能與現地略有出入。⚡ Utility-pole layer: Taipower pole registry (~2.73M poles nationwide, TWD97→WGS84; 121°E zone for the main island, 119°E for offshore counties). When on, poles in the viewport render at zoom ≥ 16. Poles standing on sidewalks are physical barriers for wheelchairs and strollers — overlay them on the clear-width colours to spot segments that exist on paper but cannot be passed. Note: Pingtung's registry is nearly empty (88 records); positions are as registered and may differ slightly on site.

資料來源：交通部「全國人行道整體區位」開放資料，兩次全國普查快照：2023 年 6 月（83,301 個路段，全國 10,167 公里）、2026 年 6 月（92,326 個路段，全國 10,939 公里）。逐路段欄位包含道路名稱、路段長度、人行道寬度、淨寬（扣除路燈、招牌等障礙物後的可通行寬度）、路緣斜坡設置數量、所在縣市與鄉鎮市區。Source: MOTC's national sidewalk-location open dataset, two nationwide snapshots — June 2023 (83,301 segments, 10,167 km total) and June 2026 (92,326 segments, 10,939 km total). Per-segment fields include road name, segment length, sidewalk width, clear width (net of obstructions such as poles and signage), curb-ramp count, and county/district.

路緣斜坡缺口率怎麼算：原始欄位 SW_RAMP 是「已設置之路緣斜坡數量」，但若此處本來就不需要斜坡（例如路段中段、無側向通行需求），會標記為「N」（2023）或留空（2026）。我們只在「需要斜坡」的路段中，計算 SW_RAMP 為 0（該裝而未裝）的比例，作為缺口率：這是一個保守、只算「真正缺口」的指標。How the ramp gap rate is computed: the source field SW_RAMP counts installed curb ramps, but is marked "N" (2023) or left blank (2026) where no ramp is needed at all. We compute the gap rate only among segments that DO need a ramp, as the share where SW_RAMP = 0 (needed but not installed) — a conservative measure of genuine gaps only.

已知限制：2023 年原始資料為 TWD97 二度分帶座標系統（EPSG:3826），2026 年官方已提供 WGS84 版本；本頁的行政區面量圖僅使用逐路段的「縣市／鄉鎮市區」欄位聚合統計，未使用逐路段座標，故不受座標系統差異影響。高雄市那瑪夏區與連江縣東引鄉的人行道資料存在於原始資料中，但因本站既有行政區界圖資（districts.geojson）缺少這兩區的邊界多邊形（與车禍地圖的既有限制相同），故無法在面量圖上著色，僅計入縣市總計與排行榜。嘉義縣資料中有 2 筆路段的縣市欄位誤植（應屬嘉義市西區），已於彙整時更正；苗栗縣「頭份市」與彰化縣「員林市」在原始資料中仍使用 2015 年改制前的舊名（頭份鎮／員林鎮），已於彙整時對應至現行名稱。Known limitations: the 2023 source used the TWD97 TM2 coordinate system (EPSG:3826); the 2026 release already ships a WGS84 version. This page's choropleth aggregates only the per-segment county/district fields, never per-segment coordinates, so it is unaffected by the coordinate-system difference. Sidewalk records exist for 那瑪夏 (Kaohsiung) and 東引鄉 (Lienchiang), but this repo's district-boundary file (districts.geojson) lacks polygons for these two districts (the same pre-existing gap as the crash maps), so they can't be shaded on the map — they're still counted in county totals and the ranking. Two segments in the Chiayi County file were mistagged (they belong to Chiayi City's West District) and were corrected during aggregation; 頭份/員林 (upgraded from 鎮 to 市 in 2015) are mapped to their current names.

Sources · MOTC 全國人行道整體區位資料 (data.gov.tw) · MOI Household Registration dataset 8410 (population) · g0v/twgeojson district boundaries