How to use the Moscow Central Diameters (MCD): Lines D1–D4 and Fares

This guide explains how to use the Moscow Central Diameters (MCD)—four suburban rail lines (D1 to D4) that cross Moscow and continue into the Moscow Region. They run on existing railways and are paid using the same Troika card system as the metro.

The practical idea is simple: tap your Troika card when entering at the MCD station, ride on the correct D1–D4 line, then tap again at the exit. When you validate twice, the transfer to the metro or the Moscow Central Circle (MCC) can be free within the allowed time window.

Quick answer: Tap your Troika card at the MCD entrance validator/turnstile, ride the correct D1–D4 direction, then tap out at the exit validator/turnstile. If you validated both times, you can get a free transfer to the metro or the MCC within the allowed time window (fare depends on central vs suburban zones).

At a Glance

Total time	Depends on the line: the full diameters take about 84 to 139 minutes end to end; a ride across the center takes 10 to 30 minutes
Typical cost	₽ per ride in the central zone with a Troika; suburban zones cost ₽ plus ₽ per zone (reports differ)
Last updated	October 7, 2026

What You Need Before You Start

• A Troika card with credit, bought with cash at a metro ticket window
• The color, number and terminal stations of your diameter, from a map
• The names of your stations, and whether both lie in the central zone
• Rubles in cash, since foreign bank cards are reported not to work
• Time to find the platform, since stations are railway stations or platforms

Compare Your Options

Option	Duration	Price	Notes
Troika card	A few minutes		Recommended for most visitors. Tap in when entering the MCD and tap out when exiting; Troika also works on the metro and the MCC. Transfers to the metro/MCC within the allowed time window require validation at both taps.
Contactless bank card	Immediate		Compatibility depends on the card and fare system rules. For predictable access, rely on a Troika card and validate your payment method before committing to a longer trip.
Face Pay	Setup needed		May require a registered account and setup tied to a Russian service. For most visitors it is not the simplest option—use Troika instead.
Standard suburban ticket	A few minutes		May work on the MCD, but transfer benefits to the metro/MCC are not the same as when paying with Troika and validating twice. Check the ticket conditions before relying on free transfers.

Step-by-Step Instructions

Step 1: Find your diameter and direction

There are four operating lines: D1 (yellow, Belorussko-Savyolovsky), D2 (pink, Kursko-Rizhsky), D3 (orange, Leningradsko-Kazansky), and D4 (green, Kaluzhsko-Nizhegorodsky). Use the MCD map at the station and confirm the D-number and the direction/terminal station names for your trip.

Tip: At larger stations, follow signs that show the diameter number (D1–D4) and color, then confirm the destination on the departures board.

Step 2: Check the fare zone (central vs suburban)

Before you enter, check whether both your start and end stations fall within the central fare zone or whether one is outside it. The fare is different for central vs suburban zones, so it affects the cost of the ride.

Tip: If your hotel is near a boundary station, re-check both ends of your trip on the zone map at the station.

Step 3: Use (or buy) a Troika card

Get a Troika card if you do not already have one. Load it at metro ticket machines or at a ticket window using the options available to you. Troika is the simplest way to cover metro, MCC, and MCD with the same card.

Tip: If you plan a trip that crosses into suburban zones, make sure your Troika balance is enough for the higher fare.

Step 4: Tap in at the entrance

At the MCD station, tap your Troika card at the entrance validator/turnstile to start the trip. MCD stations are often railway platforms and can have validators at the platform entry (or in a separate building).

Tip: If you arrive from the metro/MCC, follow signs back to the MCD validators and tap there when entering the MCD area.

Step 5: Choose the correct platform and direction

Once on the platform, look for signs showing the diameter number and color and the destination/terminal to choose the correct direction. Departures boards list the next trains and their destinations.

Tip: Rush hours can be busy; allow extra time to find your train and stand where people line up.

Step 6: Ride and watch the stops

Ride to your stop. Announcements and signage may not be fully in English, so rely on the station names and the destination displayed on the board.

Tip: If you are traveling across the center of Moscow, the ride time is usually noticeably shorter than doing the full out-and-back around the suburbs.

Step 7: Tap out at the exit and transfer

When you leave the MCD, tap out at the exit validator/turnstile. This second validation matters for transfer benefits to the metro or MCC within the allowed time window. If you skip the exit tap, you may be charged again.

Tip: When you tap out, keep walking—some transfers require a longer walk inside the station complex.

Common Mistakes to Avoid

• Forgetting the second tap at the exit: the free transfer relies on validation at both the entrance and the exit.
• Assuming the same fare applies everywhere: stations outside the central fare zone cost more.
• Confusing the MCD lines with the metro: D1–D4 are suburban rail lines with their own colors and terminal-direction signs.
• Mixing up the MCD with the MCC: the MCC is a ring line (line 14), while the MCD are through-running diameters.
• Expecting every transfer to be like between metro stations: some MCD stations are in larger rail complexes and can require a longer walk.
• Using a ticket that does not include the transfer benefit you want: the transfer rules depend on how you pay/validate.

Tickets, Payment and Booking

The MCD use the same general ticketing system as the metro. In practice, visitors usually pay with a Troika card: load it (using metro ticket machines or a ticket window) and then use it on the MCD.

Fares depend on zones. Trips within the central fare zone are priced like a metro ride; trips that go into suburban fare zones cost more. The up-to-date fare rules (including the exact zone logic) are published on the official Metro operator site, mosmetro.ru.

Transfers: if you want the metro/MCC transfer benefit, you must validate your Troika card at the entrance on the MCD and again at the exit. If the second tap is skipped, the transfer benefit may not apply.

Moscow Vibes Tips

• For complex rail hubs, plan for more walking than you would between typical metro stations; elevators and corridors can be inside the station complex.
• If you are connecting between diameters (D1–D4), check signage for the other D-number early—some connections are spread across multiple platforms and buildings.
• If your route involves a station named similarly across lines, double-check the D-number (and color) on the station signs before boarding.
• Before stepping onto the platform, confirm the destination/terminal on the departures board—trains can stop at many stations, and skipping the wrong direction usually costs time.

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FAQ

What are the Moscow Central Diameters (MCD)?

Four suburban rail lines, D1 to D4, that run across Moscow and continue into the Moscow Region. They use a shared ticketing system with the metro (Troika).

Do I need a separate ticket for the MCD?

Usually no. A Troika card works on the MCD as well as the metro and the Moscow Central Circle (MCC). The fare depends on whether your trip stays in the central fare zone or goes into the suburban fare zones.

How do free transfers work between the MCD and the metro/MCC?

To get the free transfer, the trip must be validated twice on the Troika card: once when entering at the MCD station and once when tapping out at the exit. The free transfer applies for a limited time after the first validation, and the metro/MCC transfer is free only within that window.

Where do I tap my Troika card?

Tap at the MCD validator/turnstile when you enter, and tap again at the exit validator/turnstile when you leave the MCD station.

Which diameter line serves Moskva-City?

Moskva-City is served by D4 (the green Kaluzhsko-Nizhegorodsky Diameter).

Is the MCD the same as the MCC?

No. The MCC is the separate ring line (line 14). The MCD are the through-running D1–D4 lines that cross Moscow.

Do contactless foreign bank cards work at MCD validators?

Information varies by card type and issuing bank. Use a Troika card for predictable access; check your card’s compatibility before relying on it.

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