Having ChatGPT design me a switchlist-based operating scheme. It will need adjustment (the Rico-Argentine Mill was the largest shipper on the road and it doesn't include coal traffic either for the Rico coal bins or for company engine coal) but it's an impressive start.
Also, I need to help it understand what I meant by idler...the spur at Ophir is so tight that a K-27 can't make the curve, so it needs 30-foot cars as idlers, but ChatGPT assumed it was a dedicated idler car. And the RGS didn't use tie gons, it used flat cars for ties.
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Recommended Car Roster Balance
To keep traffic believable and avoid overflow at Rico, here’s a good sweet spot:
Total Cars on Layout: 22–28
By Type:
Boxcars (6–8)
Warehouse traffic
Team track
Mill outbound
General merchandise
Gondolas / Ore Cars (6–8)
Alta Mine
Primos Chemical
Rico ore dump
Scrap/MoW
Tank Cars (2–3)
Texaco
Occasional industrial fuel
Stock Cars (3–4)
Ridgway + Rico pens
Seasonal spikes
Flatcars (2–3)
Machinery
Lumber
Idlers
MoW / Oddball (1–2)
Tie gons
Tool car
That supports:
6–10 car trains
3–6 active switching moves per town
Yard work at Rico without gridlock
40-Card Traffic Deck
Draw 6–10 per session.
Max 2 Team Track cards per session.
A) Placerville (8 cards)
Texaco – 1 tank inbound
Texaco – 1 empty tank outbound
Primos – 1 empty gon inbound
Primos – 1 carnotite load outbound
Warehouse – 1 box inbound
Warehouse – 1 box outbound
House track – lumber flat inbound (Team Track)
House track – 1 merchandise box inbound (Team Track)
B) Ophir – Alta Mine (6 cards)
Alta – 1 empty ore car inbound
Alta – 1 concentrate load outbound
Alta – 2 loads outbound
Alta – Machinery flat inbound (requires idler)
Alta – No traffic this session
Alta – 1 load + 1 empty exchange
C) Rico Industries (10 cards)
Mill – 1 ore load inbound
Mill – 1 coal car inbound
Mill – 1 processed load outbound
Ore Dump – 1 ore load inbound
Ore Dump – 1 empty outbound
Stock Pens – 2 stock cars inbound
Stock Pens – 2 stock cars outbound
MoW – 1 tie gon inbound
MoW – 1 scrap gon outbound
House Track – Machinery flat inbound (Team Track)
D) Ridgway / Interchange (8 cards)
2 cars received from D&RGW
2 cars delivered to D&RGW
1 stock car received
1 stock car delivered
1 machinery flat received
1 boxcar delivered
1 empty returned to D&RGW
No interchange today
E) South Relay (Rico) (5 cards)
2 cars forwarded south
3 cars forwarded south
1 car received from south
2 cars received from south
No south relay traffic
F) Random Team Track (3 cards)
Automobile shipment flat
Explosives boxcar
Lumber load + box outbound
Event Deck (Draw 1 every 3–4 sessions)
A. Bridge Slow Order – Max 8 cars total
B. K-27 only – Idlers required at Ophir
C. Livestock Rush – Add 2 stock cars to any pen
D. Snow Delay – No switching at Ophir
E. Empty Shortage – No empties available at Ridgway
These keep it from feeling repetitive.
Sample Session (Full Walkthrough)
Let’s simulate:
Direction: Southbound Extra
Power: K-27
Draw 8 cards:
3 – Primos empty inbound
10 – Alta load outbound
15 – Mill ore inbound
20 – Rico stock inbound
25 – 2 cars received from D&RGW
33 – 2 cars forwarded south
7 – Lumber flat to Placerville
B (Event) – K-27 only / idlers required
RIDGWAY – Build Train
Received from D&RGW:
Empty gon (for Primos)
Stock car (for Rico)
Train makeup (blocked rear to front):
[Idler]
[Empty Gon – Primos]
[Lumber Flat – Placerville]
[Stock Car – Rico]
[Ore Load – for Mill]
[Caboose]
(Alta load picked up later)
PLACERVILLE
Set out:
Lumber flat (house track)
Empty gon (Primos)
No pickups.
Train continues south.
OPHIR
Alta card = 1 load outbound.
Event = idler required.
Runaround at Lizard Head.
Use idler + K-27 to pull:
1 concentrate load
Train now:
[Idler]
[Alta Load]
[Stock Car – Rico]
[Ore Load – Mill]
[Caboose]
RICO
Set out:
Stock car to pens
Ore load to Mill
Classify Alta load:
If south relay card present (33), forward 2 cars south
So:
Alta load → South Relay
Maybe one other car forwarded
Yard work performed.
Session ends.
Why This Works
Real switching puzzle at Ophir
Yard work at Rico
Directional logic
Limited paperwork
Train length controlled
Seasonal randomness possible
