diff --git a/web/src/views/DashboardView.vue b/web/src/views/DashboardView.vue
index 8b8b02f..edc7627 100644
--- a/web/src/views/DashboardView.vue
+++ b/web/src/views/DashboardView.vue
@@ -161,9 +161,14 @@ function finishSetup() {
   <!-- Dashboard ─────────────────────────────────────────────────────────────── -->
   <div v-else class="page">
     <div class="db-body">
-      <!-- Main column: the briefing alone, ending on its calm line ────────── -->
+      <!-- Main column: the briefing, then the week's traffic ──────────────── -->
       <div class="db-main">
         <BriefingWidget :loading="loading" :open-count="openCount" :busiest="issues" :last-visit="lastVisit" />
+        <!-- Full width: squeezed into the aside the hourly cells were too small to
+             read, and a calm briefing left the main column nearly empty. -->
+        <div class="db-tail">
+          <TransactionDensityWidget />
+        </div>
       </div>
 
       <!-- Aside column: health, then performance context ────────────────── -->
@@ -173,7 +178,6 @@ function finishSetup() {
         <ProjectsWidget />
         <AlertsWidget />
         <SlowTransactionsWidget :loading="loading" :tx-summaries="txSummaries" />
-        <TransactionDensityWidget />
       </aside>
     </div>
   </div>
@@ -196,6 +200,10 @@ function finishSetup() {
   border-right: 1px solid var(--border-soft);
 }
 
+.db-tail {
+  padding: 8px 16px 40px;
+}
+
 .db-aside {
   min-width: 0;
   padding: 32px 8px 40px;
@@ -208,6 +216,7 @@ function finishSetup() {
 @media (max-width: 768px) {
   .db-body { grid-template-columns: 1fr; }
   .db-main { border-right: none; }
+  .db-tail { padding: 0 0 28px; }
   /* On phones the health summary follows the briefing. */
   .db-aside { padding: 8px 0 28px; border-top: 1px solid var(--border-soft); }
 }
diff --git a/web/src/views/__tests__/DashboardView.test.ts b/web/src/views/__tests__/DashboardView.test.ts
index aa70af8..ff65825 100644
--- a/web/src/views/__tests__/DashboardView.test.ts
+++ b/web/src/views/__tests__/DashboardView.test.ts
@@ -405,14 +405,17 @@ describe('DashboardView', () => {
   })
 
   describe('widget layout', () => {
-    it('lets the briefing end the main column and keeps health, then performance, beside it', () => {
+    it('follows the briefing with the week\'s traffic and keeps health, then performance, beside it', () => {
       const wrapper = makeWrapper({
         projects: [{ id: 'p1', name: 'A', slug: 'a' }, { id: 'p2', name: 'B', slug: 'b' }],
       })
       const titles = (column: string) => wrapper.findAll(`${column} .db-sec__title`).map(t => t.text())
-      expect(wrapper.find('.db-main > .brief').exists()).toBe(true)
-      expect(wrapper.findAll('.db-main > *')).toHaveLength(1)
-      expect(titles('.db-aside')).toEqual(['Vitals · 24h', 'Release health', 'Projects', 'Recent alerts', 'Slowest transactions', 'Traffic · last 7 days'])
+      const main = wrapper.findAll('.db-main > *')
+      expect(main).toHaveLength(2)
+      expect(main[0].classes()).toContain('brief')
+      expect(main[1].classes()).toContain('db-tail')
+      expect(titles('.db-tail')).toEqual(['Traffic · last 7 days'])
+      expect(titles('.db-aside')).toEqual(['Vitals · 24h', 'Release health', 'Projects', 'Recent alerts', 'Slowest transactions'])
     })
 
     it('fetches widget data only once the dashboard itself is shown', () => {
diff --git a/web/src/views/dashboard/TransactionDensityWidget.vue b/web/src/views/dashboard/TransactionDensityWidget.vue
index 00a44fd..c64aff8 100644
--- a/web/src/views/dashboard/TransactionDensityWidget.vue
+++ b/web/src/views/dashboard/TransactionDensityWidget.vue
@@ -100,6 +100,10 @@ function cellColor(v: number): string {
           :style="cellColor(cell) ? { background: cellColor(cell) } : undefined"
         />
       </div>
+      <!-- Hour axis under the grid, every six hours. -->
+      <div class="db-heatmap__axis" aria-hidden="true">
+        <span v-for="h in [0, 6, 12, 18]" :key="h" class="db-heatmap__tick" :style="{ left: `${(h / 24) * 100}%` }">{{ String(h).padStart(2, '0') }}:00</span>
+      </div>
       <div class="db-heatmap__foot">
         <span class="db-heatmap__leg-lbl">low</span>
         <div class="db-heatmap__cell db-heatmap__cell--legend" style="background: oklch(from var(--accent) l c h / 0.20)" />
@@ -125,7 +129,7 @@ function cellColor(v: number): string {
 .db-heatmap__row {
   display: flex;
   align-items: center;
-  gap: 1px;
+  gap: 2px;
   margin-bottom: 2px;
 }
 
@@ -142,7 +146,7 @@ function cellColor(v: number): string {
 .db-heatmap__cell {
   position: relative;
   flex: 1;
-  height: 9px;
+  height: 16px;
   border-radius: 2px;
   background: var(--surface-2);
   min-width: 0;
@@ -170,6 +174,29 @@ function cellColor(v: number): string {
 .db-heatmap__cell--legend {
   flex: none;
   width: 11px;
+  height: 11px;
+}
+
+/* Ticks sit over the cell area: the day labels take the first 28px. */
+.db-heatmap__axis {
+  position: relative;
+  height: 14px;
+  margin: 4px 0 0 28px;
+}
+
+.db-heatmap__tick {
+  position: absolute;
+  top: 0;
+  font-size: 10px;
+  color: var(--text-3);
+  opacity: 0.5;
+  font-variant-numeric: tabular-nums;
+}
+
+@media (max-width: 768px) {
+  .db-heatmap { padding: 8px 0 10px; }
+  .db-heatmap__row { gap: 1px; }
+  .db-heatmap__cell { height: 12px; }
 }
 
 .db-heatmap__foot {
diff --git a/web/src/views/dashboard/__tests__/widgets.test.ts b/web/src/views/dashboard/__tests__/widgets.test.ts
index 2ce873a..628648f 100644
--- a/web/src/views/dashboard/__tests__/widgets.test.ts
+++ b/web/src/views/dashboard/__tests__/widgets.test.ts
@@ -416,5 +416,6 @@ describe('TransactionDensityWidget', () => {
     expect(wrapper.findAll('.db-heatmap__row')).toHaveLength(7)
     expect(wrapper.findAll('.db-heatmap__row .db-heatmap__cell')).toHaveLength(7 * 24)
     expect(wrapper.find('.db-heatmap__row .db-heatmap__cell').attributes('data-tip')).toMatch(/00:00–01:00 · no events$/)
+    expect(wrapper.findAll('.db-heatmap__tick').map(t => t.text())).toEqual(['00:00', '06:00', '12:00', '18:00'])
   })
 })