Track system · Toy train

LEGO Duplo: track pieces, radii and turnouts

This data sheet shows the LEGO® DUPLO® train track pieces with their sizes: the parts a LEGO® DUPLO® train track set is built from and extended with. Layouts to copy are on the page LEGO® DUPLO® train track layouts.

The Trackplanner catalogue lists 6 pieces: 3 straights, 1 curve, 1 Y turnout and 1 crossing. The curve has a 25.6 cm radius.

Key facts

ScaleToy train
Statuscurrent — in production and in the shops
Turnout motornone — the system offers none
Pieces in the catalogue6
Radii1 · 256 mm
Straight lengths128 · 1020 mm

Pieces by type

TypeCount
Straights3
Curves1
Y turnouts1
Crossings1

Radii

Radius Angle Articles
256 mm 30° 2735

Turnouts and crossings

ArticleTypeAngle
51560 Y turnout —
6376 Crossing 60°

All pieces

ArticleTypeDimensions
2734Straight128 mm
6391Straight128 mm
2738Straight1020 mm
2735CurveR 256 mm · 30°
51560Y turnout—
6376Crossing60°

Dimensions in mm, angles in degrees, from the Trackplanner catalogue. Where the data does not give a value unambiguously, the field stays empty.

Track plans with LEGO Duplo

The gallery has 9 public track plans built with LEGO Duplo. These are the ones it recommends right now:

Doppelschleife, 145 × 57 cm

Toy train · LEGO Duplo · S (5–16 ft²) · 24 track pieces · 2 turnouts · by Trackplanner Team

Zwei Kehrschleifen für LEGO® DUPLO® Schienen. Jede Schleife beginnt an einer Y-Weiche, die beiden Weichen liegen Spitze an Spitze. In jeder Schleife wendet der…

  • Loop
  • Single track
  • Reverse loop
Open in your browser & edit as a template →

See all 9 track plans with LEGO Duplo →

Changes

8 November 2026

  • 6391 Appearance

    Level crossing 6391 now shows its road plate. Roads can be docked on both sides.

7 October 2026

  • 2734 Shape corrected Appearance

    Length corrected to the original dimension: 12.8 instead of 12.75 cm.

  • 2735 Shape corrected Appearance

    Radius corrected to the original dimension: 25.6 instead of 25.8 cm (30°, 12 curves make a circle).

  • 2736 No longer in the catalogue

    Replaced by crossing 6376 with the original dimensions (60°, 12.8 cm legs).

  • 51560 New

    New: Duplo switch 51560 (Y-shaped, one curve to the left and one to the right).

  • 6376 New

    New: crossing 6376, 60°.

  • 6391 New

    New: level crossing 6391.

  • — No longer in the catalogue

    Replaced by the real Duplo switch 51560 (now fits the curve exactly).

5 October 2026

  • 2736 Appearance

    Drawing cleaned up: a stray zero-radius arc removed.

  • 2736 Appearance

    Sleeper layout tidied: duplicate sleepers of overlapping routes removed, long turnout timbers, gaps closed.

  • — Appearance

    Sleeper layout tidied: duplicate sleepers of overlapping routes removed, long turnout timbers, gaps closed.