# TSE Rail Seatmap Brief

Date: 2026-07-06

## Scope

This brief records the first measured replacement seatmap candidates for TSE Rail after the previous workspace image was confirmed to be a Borealis privileges chart rather than a train seatmap.

The public Rolling Stock page also includes an editable long HTML map. Each carriage is rendered as an equal 32 m module, while the interior zones use their millimetre lengths as proportional flex weights.

The generated SVGs are the seat-level drawings. Every passenger place is emitted as its own editable SVG placement group with a `data-seat-id`, class, row, side, pitch, forward-facing direction, and pseudo-3D top-down styling. The actual seat art uses one reusable iconic SVG symbol per class, copied into each placement with `<use>`. `TSE-8.jpg` is used as seat-detail design advice only: it informs the blocky seat panels, headrest bars, side rails, and Magna table treatment, not the carriage layout.

## Fixed Envelope

- Carriage length: 32,000 mm
- Carriage body width: 3,120 mm
- Aisle width: 600 mm
- Door provision: one door pair per carriage, 800 mm per side
- Premium module width selected: 1,260 mm per side, consuming the full 3,120 mm body width with the 600 mm aisle
- Classica module width selected: 1,120 mm per side, leaving 140 mm side clearance for the simpler turning mechanism
- Passenger-facing facility ratio: 1 lavatory per 50 passengers and 1 service point per 50 passengers

## Candidate A: Optimized 13-Car

- Formation: 3 Classica, 2 Nobilis, 5 Magna, 1 kitchen-service, 2 Primum
- Capacity: 700 passengers
- Class split: 336 Classica, 152 Nobilis, 180 Magna, 32 Primum
- Paid-comfort share: 52%
- Seat-level SVG: 700 individual editable seat groups
- Service: 14 lavatories and 14 service points at 1:50, plus 2 Primum shower rooms
- Kitchen: dedicated non-revenue kitchen-service car between Magna and Primum

## Candidate B: Compact 7-Car

- Formation: 1 Classica, 1 Classica/Nobilis transition, 1 Nobilis/Magna transition, 2 Magna, 1 kitchen-service, 1 Primum
- Capacity: 350 passengers
- Class split: 168 Classica, 76 Nobilis, 90 Magna, 16 Primum
- Paid-comfort share: 52%
- Seat-level SVG: 350 individual editable seat groups
- Service: 7 lavatories and 7 service points at 1:50, plus 1 Primum shower room
- Kitchen: dedicated non-revenue kitchen-service car between Magna and Primum

## Pitch Rules Used

- Primum: 2,500 mm suite pitch, above the 2,400 mm minimum
- Magna: 2,100 mm bulkhead pitch; 1,250-1,300 mm regular pitch
- Nobilis: 1,800 mm bulkhead pitch; 1,200-1,260 mm regular pitch
- Classica: 1,300 mm bulkhead pitch; 870-900 mm regular pitch

## Files

- `assets/seatmaps/tse-seatmap-optimized-13-car.svg`
- `assets/seatmaps/tse-seatmap-compact-7-car.svg`
- `borealis-alliance.html` (`#rolling-stock`, Long Seatmap tab)
- `seatmap-source/build-seatmaps.mjs`

## Remaining Design Risks

- The 1,260 mm premium module choice treats the full 3,120 mm as usable interior body width. Final engineering must confirm interior trim, wall curvature, privacy-shell thickness, and structural clearances.
- A 600 mm aisle is shown as a continuous passenger aisle, not a wheelchair turning circle. Vestibules and accessible bays need a separate accessibility envelope pass.
- Magna lie-flat stagger assumes footwells can interlock without intruding into the aisle.
- Each Magna editable placement uses the same iconic Magna symbol: a reduced-length seat and one side table with the same transverse width as the seat.
- Every second Magna placement is flipped horizontally from that same class icon.
- The kitchen-service car is intentionally generous; later work can tune galley size once menu, staffing, waste, and trolley models are known.