Adjust tunnel component to offer mid-tunnel section.

src/lib/components/mapIcons/Tunnel.svelte

@@ -2,7 +2,7 @@
 	import BaseTrack from './BaseTrack.svelte';
 
 	export let feature: {
-		tunnelType: 'start' | 'whole' | 'end';
+		tunnelType: 'start' | 'whole' | 'end' | 'mid';
 		length: string;
 	};
 
@@ -13,7 +13,7 @@
 	const portalColour = '#475569'; // Slate grey
 
 	$: effectiveType = (() => {
-		if (!reversed || feature.tunnelType === 'whole') return feature.tunnelType;
+		if (!reversed || feature.tunnelType === 'whole' || feature.tunnelType === 'mid') return feature.tunnelType;
 		return feature.tunnelType === 'start' ? 'end' : 'start';
 	})();
 </script>
@@ -32,7 +32,7 @@
 		{/if}
 	</g>
 
-	{#if feature.tunnelType === 'whole' && feature.length}
+	{#if feature.length}
 		<rect x="12" y="26" width="40" height="12" fill="white" />
 		<text
 			x="32"

static/mapFiles/yaml/0230.yaml

@@ -125,4 +125,244 @@ routeDetail:
     name: Purton Common Crossing
     kind: MSL
     miles: 81
-    chains: 65
+    chains: 65
+
+  - type: crossing
+    name: Purton No.129 Foot Crossing
+    kind: foot
+    miles: 82
+    chains: 9
+
+  - type: minorBridge
+    name: Farm Bridge
+    position: over
+    category: road
+    miles: 82
+    chains: 13
+
+  - type: crossing
+    name: Purton No.34 Foot Crossing
+    kind: foot
+    miles: 82
+    chains: 30
+
+  - type: minorBridge
+    name: Carpenter's
+    position: under
+    category: road
+    miles: 82
+    chains: 39
+
+  - type: minorBridge
+    name: Braydon Brook
+    position: under
+    category: stream
+    miles: 82
+    chains: 53
+
+  - type: minorBridge
+    name: Oak Hill (Coxhill Farm)
+    position: under
+    category: road
+    miles: 82
+    chains: 69
+
+  - type: crossing
+    kind: uwc
+    name: Clover's Foot Crossing
+    miles: 83
+    chains: 11
+
+  - type: minorBridge
+    name: Farm Bridge
+    position: over
+    category: road
+    miles: 83
+    chains: 28
+
+  - type: crossing
+    name: Gambols Farm Crossing
+    kind: uwc
+    miles: 83
+    chains: 57
+
+  - type: minorBridge
+    name: Black Dog Road
+    roadName: B4696
+    category: road
+    position: over
+    miles: 84
+    chains: 25
+
+  - type: crossing
+    kind: uwc
+    name: Gryphon Lodge Crossing
+    miles: 84
+    chains: 66
+
+  - type: minorBridge
+    position: under
+    category: stream
+    miles: 84
+    chains: 22
+
+  - type: minorBridge
+    position: over
+    name: Station Road
+    roadName: B4040
+    category: road
+    miles: 85
+    chains: 36
+
+  - type: siteof
+    name: Minety & Ashton Keynes
+    description: Former station
+    miles: 85
+    chains: 37
+
+  - type: crossing
+    kind: foot
+    name: Minety No.44 Foot Crossing
+    miles: 85
+    chains: 62
+
+  - type: crossing
+    kind: foot
+    name: Minety No.6 Foot Crossing
+    miles: 86
+    chains: 06
+
+  - type: minorBridge
+    nam: Askew Bridge
+    category: road
+    position: under
+    miles: 86
+    chains: 18
+
+  - type: crossing
+    kind: foot
+    name: Minety No.3 Foot Crossing
+    miles: 86
+    chains: 23
+
+  - type: minorBridge
+    position: under
+    category: road
+    name: Minety Moor
+    miles: 86
+    chains: 36
+
+  - type: crossing
+    kind: foot
+    name: Minety No.5 Foot Crossing
+    miles: 86
+    chains: 42
+
+  - type: crossing
+    kind: CCTV
+    name: Minety LC
+    description: CCTV by TVSC (LC Workstation)
+    miles: 86
+    chains: 74
+
+  - type: crossing
+    kind: foot
+    name: Minety No.26 Foot Crossing
+    miles: 87
+    chains: 4
+
+  - type: crossing
+    kind: foot
+    name: Minety No.26 Foot Crossing
+    miles: 87
+    chains: 31
+
+  - type: minorBridge
+    position: under
+    category: road
+    name: Slurt Bridge
+    miles: 87
+    chains: 63
+
+  - type: minorBridge
+    position: under
+    category: stream
+    name: Swill Brook
+    miles: 88
+    chains: 5
+
+  - type: crossing
+    kind: foot
+    name: Oaksey No.5 Foot Crossing
+    miles: 88
+    chains: 31
+
+  - type: minorBridge
+    position: over
+    name: Oaksey Road
+    category: road
+    miles: 88
+    chains: 37
+
+  - type: crossing
+    name: Oaksey No.4 Foot Crossing
+    kind: foot
+    miles: 88
+    chains: 56
+
+  - type: minorBridge
+    position: under
+    category: road
+    miles: 88
+    chains: 77
+
+  - type: crossing
+    name: West End Farm Foot Crossing
+    kind: foot
+    miles: 89
+    chains: 29
+
+  - type: minorBridge
+    name: Poole Keynes
+    position: under
+    category: road
+    miles: 89
+    chains: 30
+
+  - type: crossing
+    name: Kemble Wick Foot Crossing
+    kind: foot
+    miles: 89
+    chains: 59
+
+  - type: minorBridge
+    name: Wick Bridge
+    position: over
+    category: road
+    miles: 90
+    chains: 3
+
+  - type: tunnel
+    tunnelType: whole
+    name: Kemble Tunnel
+    length: 0mi 409yd
+    miles: 90
+    chains: 50
+
+  - type: crossovers
+    name: Kemble Jn
+    miles: 90
+    chains: 65
+
+  - type: junction
+    diverges: left
+    direction: down
+    description: Up Kemble Siding (Former platform)
+    miles: 90
+    chains: 74
+    name: Kemble GF
+
+  - type: station
+    name: Kemble
+    miles: 90
+    chains: 79