What's real, and what isn't.

Track path, tunnels and viaducts (all five lines)Verified

The real track from OpenStreetMap, accurate to a few metres, with its elevated and underground stretches. Poonamallee Bypass–Vadapalani measures 14.73 km against the official 14.64 km.

Station positions and orderVerified

OpenStreetMap stations on the real track. Lines 3 and 5 are not fully mapped yet: their missing stations (43 of 48, 18 of 45) follow the Wikipedia station lists and sit at the same-name bus stop or locality, or are spaced evenly between neighbours. Each station page says which.

Which Line 4 stations are served at openingVerified

11 served between Poonamallee Bypass and Vadapalani; six Arcot Road stations passed without stopping (CMRS approval and opening coverage).

Route lengths, opening, headway, faresReported

As published (CMRL, news coverage, Wikipedia). Lines 3, 5 and Line 4 east are under construction and ridden as previews: every station is a stop and timings are illustrative.

City: buildings, streets, water, parksApproximate

Real OpenStreetMap footprints and street grid within 700 m of every line. Heights are estimated (OSM has almost none here). Streets with no buildings mapped get plausible plots along the real street.

Flyovers and interchangesApproximate

Paths, lanes and which roads are bridges from OpenStreetMap; deck height (7.5 m), 4% ramps, barriers and piers are standard values, not survey data.

Landmarks (temples, malls, cinema, hospital, bus stands)Approximate

Placed from published coordinates or traced from satellite views and photos; the same spot on every line. Models are stylised; hoardings and film posters are invented.

Train length, cars, speedsVerified

Alstom Metropolis: 3 cars, 67.8 m, 80 km/h operating, 90 km/h design. The same three-car train is used on every line (Lines 1 and 2 really run four-car Phase I trains).

Porur–Vadapalani speed limitReported

Raised from 25 to 40 km/h in May 2026 per news coverage of the CMRS approval.

Acceleration, braking, dwellAssumed

Typical metro values (1.0 m/s², 0.85 m/s², 22 s); CMRL has not published them.

Train livery and interiorApproximate

Stylised after photos of CMRL Alstom Metropolis trainsets.

Station interiors in Walk modeProcedural

One generic floor plan for every elevated station (concourse, ticket office, fare gates, escalators, street stairs, signs), not a survey of any real one. The used-ticket box at the exit is illustrative. Underground concourses are not modelled yet.

Ticket bought in Walk modeReported

A single-journey paper QR ticket from the counter at the full distance-band fare: CMRL sells these at counters, and its 20% discount does not apply to them (DT Next, 1 Sep 2026).

Facades, shop names, traffic, crowdsProcedural

Window patterns, invented shop names, road traffic and passengers are generated, seeded so they are the same on every visit.

Every value lives in src/data/*.json beside its source, so a correction needs no code change. Last checked 3 October 2026.