BE ETCS and speed signals (#230)

http://localhost:8000/#view=16/50.619329/5.576643&style=speed


![image](https://github.com/user-attachments/assets/62a49c5b-acc9-4ccb-8341-922a5db78a34)

features/signals_railway_signals.yaml

@@ -648,6 +648,61 @@ features:
       - { tag: 'railway:signal:speed_limit', value: 'BE:VIS' }
       - { tag: 'railway:signal:speed_limit:form', value: 'light' }
 
+  - description: Reference speed
+    country: BE
+    icon:
+      match: 'railway:signal:speed_limit:speed'
+      cases:
+        - { regex: '^(12|16)0$', value: 'be/PVR-{}', example: 'be/PVR-{120}' }
+      default: 'be/PVR-empty'
+    tags:
+      - { tag: 'railway:signal:speed_limit', value: 'BE:PVR' }
+      - { tag: 'railway:signal:speed_limit:form', value: 'sign' }
+
+  - description: Announcement of a speed limit
+    country: BE
+    icon:
+      match: 'railway:signal:speed_limit_distant:speed'
+      cases:
+        - { regex: '^90$', value: 'be/PVA-{}', example: 'be/PVA-{90}' }
+      default: 'be/PVA-empty'
+    tags:
+      - { tag: 'railway:signal:speed_limit_distant', value: 'BE:PVA' }
+      - { tag: 'railway:signal:speed_limit_distant:form', value: 'sign' }
+
+  - description: Beginning of a speed limit
+    country: BE
+    icon:
+      match: 'railway:signal:speed_limit:speed'
+      cases:
+        - { regex: '^(9|10|14)0$', value: 'be/PVO-{}', example: 'be/PVO-{100}' }
+      default: 'be/PVO-empty'
+    tags:
+      - { tag: 'railway:signal:speed_limit', value: 'BE:PVO' }
+      - { tag: 'railway:signal:speed_limit:form', value: 'sign' }
+
+  - description: Higher speed limit below reference speed
+    country: BE
+    icon:
+      match: 'railway:signal:speed_limit:speed'
+      cases:
+        - { regex: '^(4|6|9|10)0$', value: 'be/PVJ-{}', example: 'be/PVJ-{60}' }
+      default: 'be/PVJ-empty'
+    tags:
+      - { tag: 'railway:signal:speed_limit', value: 'BE:PVJ' }
+      - { tag: 'railway:signal:speed_limit:form', value: 'sign' }
+
+  - description: Higher speed limit for some traffic
+    country: BE
+    icon:
+      match: 'railway:signal:speed_limit:speed'
+      cases:
+        - { regex: '^60$', value: 'be/PVV-{}', example: 'be/PVV-{60}' }
+      default: 'be/PVV-empty'
+    tags:
+      - { tag: 'railway:signal:speed_limit', value: 'BE:PVV' }
+      - { tag: 'railway:signal:speed_limit:form', value: 'sign' }
+
   - description: Panto distant
     country: BE
     icon: { default: 'be/PBA' }
@@ -672,6 +727,33 @@ features:
       - { tag: 'railway:signal:electricity:form', value: 'sign' }
       - { tag: 'railway:signal:electricity:type', value: 'pantograph_up' }
 
+  - description: train protection block markers (arrow)
+    country: BE
+    icon:
+      match: 'railway:signal:position'
+      cases:
+        - { regex: '^left$', value: 'general/etcs-stop-marker-arrow-right' }
+        - { regex: '^overhead$', value: 'general/etcs-stop-marker-arrow-down' }
+      default: 'general/etcs-stop-marker-arrow-left'
+    tags:
+      - { tag: 'railway:signal:train_protection', value: 'BE:PRA' }
+      - { tag: 'railway:signal:train_protection:form', value: 'sign' }
+      - { tag: 'railway:signal:train_protection:type', value: 'block_marker' }
+      - { tag: 'railway:signal:train_protection:shape', value: 'triangle' }
+
+  - description: train protection block markers (triangle)
+    country: BE
+    icon:
+      match: 'railway:signal:position'
+      cases:
+        - { regex: '^left$', value: 'general/etcs-stop-marker-triangle-right' }
+        - { regex: '^overhead$', value: 'general/etcs-stop-marker-triangle-down' }
+      default: 'general/etcs-stop-marker-triangle-left'
+    tags:
+      - { tag: 'railway:signal:train_protection', value: 'BE:PRA' }
+      - { tag: 'railway:signal:train_protection:form', value: 'sign' }
+      - { tag: 'railway:signal:train_protection:type', value: 'block_marker' }
+
   # --- CH --- #
 
   - description: Vorsignal System L