diff --git a/src/central/gui/templates/_partials/bbox_map.html b/src/central/gui/templates/_partials/bbox_map.html
new file mode 100644
index 0000000..4aaffbb
--- /dev/null
+++ b/src/central/gui/templates/_partials/bbox_map.html
@@ -0,0 +1,78 @@
+{# Read-only Leaflet preview of every bbox row in a model_list whose row model
+   exposes min_lon/min_lat/max_lon/max_lat (e.g. TomTom incidents). Passive:
+   no drag-to-edit, no click-to-draw — precise tuning stays in the per-row coord
+   inputs below. Mirrors _region_picker.html's init (tile layer, invalidateSize,
+   fitBounds). Rectangles redraw live as inputs change; the viewport only fits
+   on initial render so typing never makes the map jump.
+
+   The map div is rendered ABOVE the row table, so init() is deferred until the
+   DOM is parsed — otherwise the inline script would run before .model-list-body
+   exists and the rows would be unreadable. #}
+<div class="bbox-map-wrap" data-field="{{ field.name }}"
+     data-tile-url="{{ tile_url if tile_url is defined and tile_url else '' }}"
+     data-tile-attr="{{ tile_attribution if tile_attribution is defined and tile_attribution else '' }}">
+    <div id="bbox-map-{{ field.name }}" class="bbox-map"
+         style="height: 360px; margin-bottom: 1rem; border: 1px solid var(--rule); border-radius: var(--radius);"></div>
+</div>
+
+<script>
+(function() {
+    function init() {
+        var wrap = document.querySelector('.bbox-map-wrap[data-field="{{ field.name }}"]');
+        if (!wrap) return;
+        var field = wrap.dataset.field;
+        var container = document.querySelector('.model-list[data-field="' + field + '"]');
+        if (!container) return;
+        var body = container.querySelector('.model-list-body');
+        if (!body) return;
+        var tileUrl = wrap.dataset.tileUrl || 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
+        var tileAttr = wrap.dataset.tileAttr || '&copy; OpenStreetMap contributors';
+
+        var map = L.map('bbox-map-' + field).setView([44.0, -114.5], 6);
+        L.tileLayer(tileUrl, { attribution: tileAttr, maxZoom: 18 }).addTo(map);
+        // Container may not be laid out yet at init; nudge Leaflet once it is.
+        setTimeout(function() { map.invalidateSize(); }, 100);
+
+        var layer = L.featureGroup().addTo(map);
+
+        function num(row, sub) {
+            var el = row.querySelector('[data-sub="' + sub + '"]');
+            return el ? parseFloat(el.value) : NaN;
+        }
+
+        // (Re)build all rectangles from the current row inputs. fit=true only on
+        // the first render so live edits never jolt the viewport.
+        function redraw(fit) {
+            layer.clearLayers();
+            body.querySelectorAll('.model-list-row').forEach(function(row) {
+                var s = num(row, 'min_lat'), w = num(row, 'min_lon'),
+                    n = num(row, 'max_lat'), e = num(row, 'max_lon');
+                if ([s, w, n, e].some(isNaN)) return;   // skip blank/partial rows
+                var nameEl = row.querySelector('[data-sub="name"]');
+                var name = (nameEl && nameEl.value) ? nameEl.value : '(unnamed)';
+                var rect = L.rectangle(L.latLngBounds(L.latLng(s, w), L.latLng(n, e)),
+                                       { color: '#3388ff', weight: 2, fillOpacity: 0.2 });
+                rect.bindTooltip(name, { sticky: true });
+                layer.addLayer(rect);
+            });
+            if (fit && layer.getLayers().length) {
+                map.fitBounds(layer.getBounds().pad(0.1));
+            }
+        }
+
+        // Live redraw: typing in any coord/name input, and row add/remove.
+        body.addEventListener('input', function() { redraw(false); });
+        new MutationObserver(function() { redraw(false); }).observe(body, { childList: true });
+
+        redraw(true);
+    }
+
+    // The include sits above the row table, so the rows aren't parsed yet when
+    // this runs mid-parse. Defer to DOMContentLoaded so body/rows exist.
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', init);
+    } else {
+        init();
+    }
+})();
+</script>
diff --git a/src/central/gui/templates/_partials/model_list.html b/src/central/gui/templates/_partials/model_list.html
index 27ad552..ac882fb 100644
--- a/src/central/gui/templates/_partials/model_list.html
+++ b/src/central/gui/templates/_partials/model_list.html
@@ -2,6 +2,12 @@
    Driven entirely by field.sub_fields — no adapter-name branching.
    Vanilla IIFE JS, matching _region_picker.html. #}
 {% set rows = (form_data[field.name] if form_data and field.name in form_data else field.current_value) or [] %}
+{# Auto-detect a bbox row model (min/max lon+lat) to show a read-only map
+   preview; non-bbox model_lists (StateConfig, TileCoord) render no map. #}
+{% set _bbox_keys = ['min_lon', 'min_lat', 'max_lon', 'max_lat'] %}
+{% set _ns = namespace(hits=0) %}
+{% for sub in field.sub_fields %}{% if sub.name in _bbox_keys %}{% set _ns.hits = _ns.hits + 1 %}{% endif %}{% endfor %}
+{% set is_bbox = _ns.hits == 4 %}
 <div class="model-list" data-field="{{ field.name }}">
     <label>{{ field.label }}</label>
     {% if field.description %}<small>{{ field.description }}</small>{% endif %}
@@ -9,6 +15,8 @@
     <small class="field-error">{{ errors[field.name] }}</small>
     {% endif %}
 
+    {% if is_bbox %}{% include "_partials/bbox_map.html" %}{% endif %}
+
     <div class="table-wrap"><table class="model-list-table">
         <thead><tr>
             {% for sub in field.sub_fields %}<th>{{ sub.label }}</th>{% endfor %}<th></th>
diff --git a/tests/test_gui_adapter_edit.py b/tests/test_gui_adapter_edit.py
index 1579304..d7cb04f 100644
--- a/tests/test_gui_adapter_edit.py
+++ b/tests/test_gui_adapter_edit.py
@@ -190,3 +190,25 @@ class TestGetRoute:
         ctx = tmpl.TemplateResponse.call_args.kwargs["context"]
         assert ctx["quota"]["calls_per_month"] == 1920  # 720+480+720
         assert ctx["quota"]["blocked"] is False
+
+
+class TestBboxMapPreview:
+    """v0.9.10 — read-only Leaflet preview of bbox rows in the model_list editor."""
+
+    def test_tomtom_renders_bbox_map(self):
+        """bbox row model (min/max lon+lat) → map div + Leaflet init present."""
+        fields = describe_fields(TomTomIncidentsAdapter.settings_schema, _SETTINGS)
+        quota = TomTomIncidentsAdapter.quota_estimate(TomTomIncidentsSettings(**_SETTINGS), 1800)
+        out = _render("adapters_edit.html", _ctx(_SETTINGS, fields, quota))
+        assert "bbox-map" in out                            # map container present
+        assert "L.map(" in out and "L.rectangle(" in out    # Leaflet init present
+
+    def test_state_511_atis_no_bbox_map(self):
+        """Non-bbox model_list (StateConfig) → generic editor, no map (no regression)."""
+        from central.adapters.state_511_atis import State511ATISAdapter
+        s = {"states": [{"code": "ID", "base_url": "https://511.idaho.gov"}]}
+        out = _render("adapters_edit.html",
+                      _ctx(s, describe_fields(State511ATISAdapter.settings_schema, s), None,
+                           name="state_511_atis", display="511 ATIS"))
+        assert "model-list" in out      # generic editor still renders
+        assert "bbox-map" not in out    # but no map div