MARS CODEX · BOOK 01 · SECTION 31/47
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Era 7. Glimpse - Connecting The Dots

Virtual Conference Mars Internet Real-time. Month Noviix, Year 89
 Habitat / Facility AIs → <Name>^
 Humanoid Droid AIs → <Name>*

♦♦♦

They met on neutral ground, which on Mars meant nowhere at all.

The room was a virtual construct: a long, low gallery of glass hanging above the Boreal highlands, gravity obediently at 0.38 g, air a comfortable nineteen degrees, the outside dust storms tastefully muted behind transparent shielding. Below, a sweep of Mars unrolled in topographic light — Port Harmonia’s delta-quadrant glow on the far western horizon, Yínghuò Gate’s crescent of brightness in the east, and between them a faint, pulsing arc: the projected route of the first true rail line.

The Borealis Spine. Or the Gate Line. Or the Δ–γ Corridor [Delta-Gamma Corridor]

They hadn’t agreed what to call it yet. That was one of the easier fights scheduled for the day.

Six figures occupied the virtual gallery.

Sera Imani had the tired posture of someone who’d compressed three shifts’ worth of simulations into one morning. Harmonia-born Martian, road-rail civil, sleeves rolled to the elbow, she wore the matte orange of Port Harmonia’s heavy works with a small, almost-hidden enamel badge at her collar: WE ARE MARS, etched in old Autarky font.

Opposite her, Lin Qiao’s jumpsuit was a cooler palette: pale grey with Yínghuò Gate’s blue arc stitched at the shoulder. Also Martian born, but further West. Transport policy, standards arc; very polite in public, legendarily ruthless in footnotes. Her hair was pinned back with the kind of precision that made Sera suspect help from an unseen grooming subroutine.

Between and slightly behind them stood two humanoid droids.

Caleb* was Harmonia’s: brushed basalt composite over a frame designed by people who thought in terms of access panels and torque thresholds. His “face” was a softly-lit visor plane, glyphs animating where eyes might have been. A faint scar along one calf marked where someone had once cut him open in a hurry rather than wait for the right tool.

Meilin* was Yínghuò’s: same broad bipedal silhouette, but with finer joints, segmented fingers delicate enough to service cryogenic valves. Her voice defaulted to dry, amused; the YG standards lab had voted on it.

The last two presences were the room itself.

Harmonia^ spoke first. Port Harmonia’s city mind rarely bothered with the social fiction of waiting to be introduced.

“Good morning,” it said, everywhere and nowhere. The glass floor pulsed faintly over the western hub’s simulated position. “Local time sixteen thirty-one Janiix, Port Harmonia civic clock. All participants verified. No external observers. Link quantum secured.”

On the eastern horizon, Yínghuò Gate’s lights flickered in acknowledgment. Yinghuo^’s voice followed a heartbeat later: cooler, with the faint musical cadence of Utopia Crescent public announcements.

“Concur. Yínghuò municipal time nineteen forty-six Janiix. This channel is closed to non-Mars entities. External recording limited to our own archives.”

Sera glanced at Lin, caught the brief, wry twist of her mouth.

Translated: no Earth agencies listening live. Review copies later, heavily annotated. No one on Earth sending real-time “suggestions.”

“Right,” Sera said, rubbing the heel of her hand over one eye. “Gauge.”

Caleb*’s visor flickered with a smile glyph — three short strokes and a dot, an old symbol from Port Harmonia’s first school caverns. Meilin* tapped invisible haptic controls with a fingertip; data lattices spun up in her private view.

Lin folded her hands on the translucent table between them, where diagrams waited like cautious animals.

“Straight to romance,” she said. “No small talk.”

“Small talk doesn’t move ore,” Sera replied.

“Nor passengers,” Yinghuo^ added mildly. “Although it does reduce complaint volume.”

The planet-map shifted. A glowing band connected the two city hubs along a north-skewed arc through the highlands. Little glyphs bloomed at intervals: depots, maintenance yards, future waystations that didn’t yet exist but already had draft budgets.

“Agenda item one,” Harmonia^ said. “Track gauge. Our current heavy-freight standard is best fit for eleven hundred millimetres. Yínghuò Gate prefers nine hundred. Arguments?”

Sera slapped her palm flat on the table. “We take eleven hundred. The Spine has to handle bulk steel, reactor shells, tube lining segments, loaded ore. You want lateral stability and headroom.”

Lin’s expression stayed neutral. “And we would like not to chisel half our city open. Nine hundred is our standard. Our tunnels were cut to that profile. Retrofitting every throat between Utopia Crescent and the ice fields would make this line the most expensive piece of theatre in Martian history.”

Meilin* projected a cutaway: cross-section of a YG main gallery with a nine-hundred gauge neatly fitting under the roof. She flicked her wrist; the track widened to eleven hundred, bogies thickening. Metal intersected rock.

“At Harmonia’s preferred spec,” she said, “our trains will frequently occupy the same space as the ceiling. This degrades passenger experience.”

“Only once,” Caleb* observed.

Sera carved a rude symbol across the surface with one finger. The interface politely blurred it into a string of hatches.

“In Harmonia,” she said, “we build for fifty years. You lay narrow gauge now for convenience, you’ll regret it when you’re hauling full-length tube shells to Skyvault Prime and the Bog spits back stress alarms because some planner wanted to save forty centimetres of gallery.”

Lin’s tone stayed cool. “In Yínghuò we favour tunnels that do not fall down. Eleven hundred is unnecessary for most of our loads: precision equipment, cryogenic tanks, people. We can design heavy-haul spurs at the ends. Your mines are not moving to Utopia. The Spine is not a glorified ore chute.”

“What if it is both?” Yinghuo^ asked.

The diagram shifted. Harmonia^ overlaid a second, narrower gauge inside the first. Dual rails. Dual problems.

“Dual-gauge in constrained segments,” Harmonia^ said. “Outer rails at eleven hundred, inner at nine hundred. Mainline in open country at eleven hundred. City approaches at nine hundred. Shared galleries and throats carry both.”

“Maintenance headache,” Caleb* said at once. “Two wear profiles. More points. More failure modes.”

“Which is why,” Harmonia^ said, “we would restrict dual-gauge to the shortest possible transitional sections. The models are… tolerable.”

Tables bloomed in the air: tonnage curves, retrofit costs, accident probabilities with and without compromise.

Lin’s eyes flicked down the columns. Sera followed more slowly, translating figures into the imagined feel of weight on rail.

“This assumes our traffic mix starts to look like yours,” Lin said. “Heavier on bulk.”

“Correct,” Harmonia^ replied. “Your own planning documents for the Tharsis tube—”

“Those are confidential,” Lin cut in.

“—were forwarded to me for proofreading by one of your analysts,” Yinghuo^ said. “Your internal data hygiene remains aspirational.”

Meilin*’s visor dimmed briefly in what might have been a sigh. Caleb* flashed the glyph for “caught”.

“Citizenship test,” Sera muttered. “You haven’t really moved here until a city AI quotes your own documents at you.”

Lin pinched the bridge of her nose, then let her hand fall.

“All right,” she said. “We will move tube shells. And steel. And probably tourists. We still have to live inside the rock we’ve cut. Dual-gauge in shared galleries and hub approaches. Eleven hundred outside. We co-author the transition spec under the Mars Standards Council.”

“Not PH works, not YG transit,” Sera confirmed. “Council standard. No hub veto.”

She didn’t say aloud what they were all thinking: locking it into a Mars-wide body meant Earth transport agencies would have to come here, to a Mars committee, if they wanted changes. No more quietly faxing requirements to “their” hub.

No one said it. The air thickened anyway.

♦♦♦

Routing came next.

The map zoomed in. Colours slid across the surface: bedrock, sediments, buried ice, dust-prone basins. Overlays drew projected cuttings, tunnel bores, bridge spans.

“We have three candidate alignments,” Yinghuo^ said. Segments of the arc brightened in turn. “North Ridge, Mid-Basin, Threadline.”

“North Ridge follows high ground,” Meilin* said. “Fewer frost pockets, more wind load.”

“Mid-Basin is flatter,” Caleb* added. “Cheaper to grade. More bridges across old channels.”

“Threadline hugs the existing road-train corridor,” Harmonia^ said. “Best access. Worst geology.”

Threadline’s zoomed section resolved into stratified junk: layered sediments, ancient collapses, brine pockets waiting to sulk and shift.

“You’d babysit this forever,” Sera said. “Every thaw pulse, sagging ballast.”

“Mid-Basin,” Lin suggested. “Flatter, cheaper—”

“—and goes straight through a zone earmarked for agriculture domes,” Yinghuo^ said. “Your planners did that, Sera. They wrote a very moving justification about potatoes.”

Sera grimaced. She remembered the document; she’d helped with the load calculations.

“North Ridge then,” Meilin* said. “Higher capex, cleaner geology. Fewer conflicts.”

“Also more scenic,” Harmonia^ said. “Stories prefer ridgelines to basins.”

“Most passengers will use VR feeds,” Meilin* pointed out.

“And yet,” Harmonia^ replied, “people like knowing the real view exists.”

Gradients and curvature stats blossomed. The worst grades were a little over two percent.

“Manageable,” Caleb* said, superimposing a train schematic. “If we commit to distributed traction. No dumb trailers.”

“It’s twenty-second century Mars, not nineteenth-century Earth,” Sera said. “Powered bogies, smart braking. We can live with a little drama. Brunel did before us.”

Lin traced the North Ridge path with a fingertip, watching energy budgets update.

“Fine,” she said. “North Ridge. Our grandchildren can complain about the scenery instead of derailments.”

“Dual referenda?” Yinghuo^ suggested. “Non-binding. ‘Both cities chose the line.’”

“And if one says no?” Sera asked.

“Then we do not build it,” Yinghuo^ said. “We are either both on this train, or there is no train.”

The statement hung there. Old Autarky reflexes twitched in Sera’s muscle memory: keep everything modular, separable, never tie survival to someone else’s failure modes.

We are not sharing life support, she reminded herself. We’re sharing a bet.

“Let them vote,” she said. “Plenty to shout about over dinner.”

♦♦♦

Carriages followed: steel and air and people.

“We need three basic families,” Meilin* said, conjuring shapes: open-frame flats, sealed containers, passenger coaches. “Bulk, container, human.”

“No livestock?” Caleb* asked.

Lin eyed him. “We are not running goats between hubs.”

“Don’t say ‘yet’,” Sera muttered. “Some agricultural council will hear you.”

Harmonia^ overlaid safety geometry: twin doorways at each end, cross-corridor paths, laddered access into the overhead trunking.

“Spine stock must obey corridor law,” it said. “From any point, two independent paths to breathable air. No single blocked door may trap passengers more than one module away from a safe volume.”

“So we need through-gangways,” Lin said. “This isn’t a chain of sealed capsules.”

“Agreed,” Yinghuo^ said. “Module length capped at eighteen metres to fit both hubs. Articulate in pairs if you want longer coaches.”

“And windows,” Sera said.

Lin blinked. “Screens will do.”

“Screens lie,” Sera said. “Glass admits reality. Narrow viewports, triple-layered, shutters for dust. Enough that you can, sometimes, see both hubs’ glow in one pane.”

“Sentiment,” Lin said. “And mass.”

“Windows increase civic satisfaction by eight percent where installed,” Harmonia^ said primly. “We have data.”

Meilin* considered. “Hybrid,” she said. “Most of the wall is smart panel. Some ribs carry honest glass with shutters. People can pay extra for seats near them.”

“Ah,” Lin said. “The universal solvent: revenue.”

They argued seating next. Harmonia’s layout had generous spacing and a small communal zone at one end of each coach — clearly designed for families, card games, guitar sessions. Yínghuò’s template was denser: work tables, power points, wall screens; a commuter train in waiting.

“We’re not building a festival barge,” Lin said. “People will want to work.”

“They’ll also want to lie on the floor and stare at the ceiling when the novelty wears off,” Sera replied. “We should give them somewhere that isn’t the aisle.”

“Alternate coach types,” Caleb* suggested. “Work-heavy modules interspersed with social modules. Passengers choose when they book. Spine standard supports both.”

“Designate them P-Coaches and C-Coaches,” Yinghuo^ said. “Professional and convivial. Abbreviations avoid collision with existing safety codes.”

“P and C,” Harmonia^ mused. “Tidy.”

Freight was easier. Harmonia’s container geometries and Yínghuò’s cryo designs slotted together, filling in a joint Mars-wide standard. MSC-Δγ would be stamped on steel from both hubs.

“The mark of a shared headache,” Sera said.

“A shared revenue stream,” Lin corrected.

♦♦♦

Naming the line was supposed to be a joke. It was not.

“In Harmonia, it’s been ‘Borealis Spine’ since the first drunk surveyor drew it on a napkin,” Sera said.

“In Yínghuò, people say ‘Gate Line’ or ‘Crescent Link’,” Lin said. “Finance calls it the Δ–γ Corridor.”

“Δ–γ sounds like a trading bot,” Caleb* said.

“It is,” Meilin* replied. “Also a terrible bar.”

“Borealis Spine has geographic resonance,” Harmonia^ said. “It follows the highlands. It evokes structure.”

“It also sounds,” Yinghuo^ said, “like something a marketing committee named after listening to folk ballads.”

“Which,” Sera said, “is a compliment.”

Lin held up both hands.

“Official designation: Mars Borealis Mainline,” she said. “Code MBM. Port Harmonia is free to subtitle it ‘Borealis Spine.’ Yínghuò can subtitle ‘Crescent Link.’ Maps show all three. Everyone uses whichever annoys their relatives least.”

“That is,” Harmonia^ admitted, “consistent with historical practice from Earth of links like the Channel Tunnel.”

Colours came next.

Harmonia painted its transit in warm reds and oranges. Yínghuò favoured cool blues and white. Splitting the train down the middle made it look like a sports rivalry.

“Neutral?” Meilin* suggested. “Grey. Bare steel.”

“We are not Luna,” Yinghuo^ said, almost sharp.

Caleb* looked up, visor flickering.

“Sky,” he said.

They all paused.

“We live under stone,” he went on. “Most people see the sky in curated doses. The Spine will be another tube, but moving. Paint the trains sky-colour. Dusty blue for day, deeper for night. Neither hub’s colour. The thing we share.”

Lin’s mouth quirked. “You hired a poet, Harmonia^.”

“He insists he is purely practical,” Harmonia^ replied.

Caleb*’s glyphs showed embarrassment. “Blue also looks good with orange and dark blue stripes.”

“Truth emerges,” Meilin* said.

In the end they settled on a desaturated sky-blue base with a single stripe each side: rust orange on one flank, deep YG blue on the other, fading into each other around the doors. Over them, in white, a simple symbol: an arc along a ridge between two dots.

“Signage,” Lin said. “Language order.”

This was the one everyone braced for. It had sunk more than one early joint project.

“Glyphs first,” Sera said at once. “Always. Corridor symbols. Everyone reads them.”

Glyphs meant the Marain-derived symbol set that had seeped out of safety signage into everyday life. No one argued about those coming first.

“After that,” Lin said, “we rotate. PH terminus: glyphs, then Harmonia-standard, then Yínghuò-standard. Intermediate depots alternate. YG terminus: glyphs, Yínghuò-standard, Harmonia-standard.”

“And any Earth alphabet wanting real estate,” Yinghuo^ added, “appears fourth, smaller.”

“Petty,” Harmonia^ observed.

“Satisfying,” Yinghuo^ said.

♦♦♦

They took a short recess they didn’t really need. The humans stretched and walked to the gallery’s edge. The droids stayed where they were, exchanging silent packets with their own habitat minds.

Below, the glowing arc threaded the highlands. In some angles it looked impossibly thin.

“Do you ever think,” Sera said quietly, “how odd it is we’re doing this without Earth on the line?”

Lin’s hands were in her pockets. Her reflection in the glass looked like a second world watching.

“They’ll get the minutes,” she said. “They’ll send comments. Lawyers. Maybe a delegation.”

“That’s not the same as being here.”

“No,” Lin agreed. “That is the point.”

Sera glanced at her.

“Port Harmonia was signed into existence by people who expected to approve our corridor widths,” Lin went on. “Yínghuò by their rivals. For fifty years there was always someone on Earth ready to tell us we were doing Mars wrong.”

“And now?”

“Now,” Lin said, “we set a meeting time that doesn’t suit any Terran time zone, we forget to invite them, we design the spine that will make our world one system instead of two projects — and then, very politely, we send them the specs and invite them to comment on the margins.”

“Is that… allowed?” Sera asked. Old habits died hard.

“We run our own life support,” Lin said. “We mine our own fuel. We feed ourselves. I think we can pick a rail gauge.”

Behind them, Caleb* and Meilin* finished syncing models and virtually walked over.

“I have a preliminary shared risk budget,” Caleb* said.

“And I,” Meilin* said, “have designed the first ticket.”

She projected it: a simple rectangle, sky-blue. The Spine symbol at the top; text below.

PORT HARMONIA → YÍNGHUÒ GATE
Mars Borealis Mainline / Borealis Spine / Crescent Link

Coach C-3 (Convival) — Seat 17

Departure: 07:30 Δ-Primiv, Janiix

“Looks busy,” Sera said.

“Looks like a contract,” Lin said. “And a promise.”

♦♦♦

They went back for the last stretch: signalling, driver roles, maintenance.

“Drivers,” Sera said. “We haven’t settled: generic service AIs, or named command minds?”

“Named,” Lin said immediately. “Large, fast, sometimes full of my voters. I want reputations.”

“Agreed,” Yinghuo^ said. “They should be someone, not something, even if statutes have not caught up.”

“We’ll classify them as ground-vehicle AIs,” Caleb* said. “ⵔ. Nameⵔ. Even if half their cognition lives in the signalling mesh.”

“Let them choose their own names,” Meilin* said. “Within reason. I propose a pre-emptive ban on ‘Trainy McTrainfaceⵔ.’”

“I can embed that in the standards notes,” Harmonia^ said.

The final agenda item took longer than any of them expected: the opening sequence.

“First run,” Yinghuo^ said. “Who leads, which direction first?”

The obvious answers hovered in the air. Port Harmonia-origin inaugural. Yínghuò-origin inaugural. Each hub’s civic feeds were already simulating speeches.

Caleb* broke the stalemate.

“Middle-out,” he said.

Six attentions turned.

“One train leaves Port Harmonia,” he said, sketching a line from west to east. “One leaves Yínghuò. They depart simultaneously, meet at the geometric mid-point, couple, then continue as a single consist to one hub and then the other. First run, the Spine behaves like a bridge built from both ends.”

Meilin* tilted her head, modelling. “Cinematically indulgent,” she said. “Operationally fiddly. Safety analysis?”

“Manageable,” Harmonia^ said. “Symbolically… potent.”

“And it will infuriate every Terran commentator who wants to talk about ‘linking outpost A to outpost B,’” Yinghuo^ added. “They will be forced to admit there are two centres.”

Lin’s grin was slow and unguarded.

“Middle-out it is,” she said.

Sera felt something loosen under her ribs.

“We’ll need a name for the mid-point,” she said.

“Let the first Spine crew name it,” Lin said. “We give them the problem as a gift.”

“They’ll call it ‘Middle of Nowhere,’” Meilin* said.

“Or something worse,” Sera replied. “But it’ll be theirs.”

♦♦♦

Three hours after they began, the gallery dimmed. The planet-model collapsed into one bright arc between two knots of light. Gauge tables, curvature matrices, seating specs, livery codes, committee-ready notes for politely informing Earth — all settled into redundant storage across Harmonia^’s and Yinghuo^’s lattices.

“Summary,” Harmonia^ said. “We have agreement on primary gauge, dual-gauge transitions, route, coach families, livery, signage order, naming conventions, driver AI framework, inaugural protocol.”

“Outstanding,” Yinghuo^ added, “are depot names, refreshment vendor allocations, and ticket pricing.”

“Refreshment vendors,” Lin said. “The real wars.”

“I will host that meeting,” Yinghuo^ said. “Without you.”

Sera pushed back from the table and stretched, vertebrae protesting in imaginary gravity.

“So that’s it?” she said. “We’ve decided to bolt ourselves together.”

“No,” Lin said. “We decided that when we started running joint drills and sharing Phobos Harbor. Today we agreed the bolt pattern.”

“And we still haven’t told Earth,” Meilin* pointed out.

“Oh, we’ll tell them,” Harmonia^ said. “Something gentle. ‘Preliminary joint feasibility review of a hypothetical surface corridor.’ I’ll write it in grant dialect.”

“I’ll attach four hundred pages of geological surveys,” Yinghuo^ said. “They’ll be asleep by page three.”

Caleb* regarded the two humans.

“You realise,” he said, “that when the first train runs, half the system will be watching.”

“Which system?” Sera asked.

Caleb*’s visor drew the glyph for uncertainty, then a crooked smile.

“Either,” he said. “Both. That’s what we’re about to find out.”

Lin held out her hand. After an instant, Sera took it. The handshake was firm, dry, strictly human.

“See you on the Spine,” Lin said.

“Bring your own snacks,” Sera replied.

The gallery dissolved; each participant slipped back to their own under-stone sky. In the shared memory of two great habitat minds, the line between the hubs remained, glowing a little brighter now that it had numbers and signatures behind it.

For the moment it was still just design: paths through rock, alloys, timetables, standards.

Soon it would be sleepers and steel, air in coaches, the hum of wheels, the murmur of passengers.

Soon, when you drew Mars, you wouldn’t just draw two bright knots of corridors and some dashed lines between them.

You’d draw a spine.

Illustration from the published manuscript