Track interchange

Whether two brands' HO or N scale track will physically join comes down mostly to whether the rail is the same height — manufacturers publish this as a "Code" number (Code 83, Code 65, and so on). This page cross-checks the Code numbers each manufacturer has published for these three lines. It does not cross-check roadbed height or width, because none of the three publish that measurement on their consumer product pages (see Known gaps below).

Same rail code — compatible Different rail code — needs a transition piece Not published by the manufacturer

Cross-brand rail-code check

4 checks across HO and N scale · 1 same code · 1 different code · 2 not published by the manufacturer. Counted by summarizeMatrix() — see method.

Rail code (rail-height) cross-check, by scale
System A	System B	Scale	Status
Kato USA UNITRACK	Atlas True-Track	HO	Same rail code — compatible Both publish Code 83 for HO — same rail height. Roadbed height and joiner fit haven't been checked (see fact sheets below).
Kato USA UNITRACK	Atlas True-Track	N	Different rail code — needs a transition piece Kato USA Code 80 vs Atlas Code 65 — different rail height, needs a transition piece. Neither manufacturer publishes an official transition track for this pair.
Kato USA UNITRACK	Bachmann E-Z Track® (Nickel Silver w/ gray roadbed line)	HO	Not published by the manufacturer At least one side does not publish a Code number for HO — not published by the manufacturer, not guessed here.
Atlas True-Track	Bachmann E-Z Track® (Nickel Silver w/ gray roadbed line)	HO	Not published by the manufacturer At least one side does not publish a Code number for HO — not published by the manufacturer, not guessed here.

Manufacturer fact sheets

Every field below is either a manufacturer's own published value with its source link and the date we checked it, or is marked not published by the manufacturer.

Kato USA — UNITRACK HON

Roadbed: One-piece molded gray plastic roadbed (built into the track section) source · checked 2026-09-25
Rail code (HO): Code 83 — Kato's shop and overview pages (katousa.com/unitrack/) describe the rail only as nickel silver and don't print a Code number; the Code number comes from Kato's own UNITRACK catalog PDF, page 27, which states the rail height as 2.11 mm (0.083 in.). source · checked 2026-09-25
Rail code (N): Code 80 — From the same catalog PDF, page 8, which states the rail height as 2.03 mm (0.080 in.). Kato's shop and overview pages don't print a Code number for N scale either. source · checked 2026-09-25
Joiner: UniJoiner — removable metal joiner; an insulated version is also sold source · checked 2026-09-25
Cross-brand joiner statement: Kato states the same UniJoiner piece works across N scale and HO scale UNITRACK, and also on other companies' TT scale and HOn3 scale track. — This is Kato's own cross-brand claim, but it names TT scale and HOn3 scale track — it does not name Atlas or Bachmann HO/N track specifically, so it can't be read as a claim that UniJoiner mates with Atlas True-Track or Bachmann E-Z Track. source · checked 2026-09-25
Official transition track to another brand: not published by the manufacturer — No Kato-published transition track for joining UNITRACK to another manufacturer's HO or N track system turned up in this batch.

Atlas — True-Track HON

Roadbed: Removable molded plastic roadbed (HO version molded with dark-brown tie color) source · checked 2026-09-25
Rail code (HO): Code 83 — Atlas also sells HO rail without integrated roadbed in Code 100 and Code 83, per the shop's own category navigation. source · checked 2026-09-25
Rail code (N): Code 65 — Atlas also sells N rail without integrated roadbed in Code 80 and Code 55, per the shop's own category navigation. source · checked 2026-09-25
Joiner: Rail joiners built into the True-Track roadbed sections; also sold separately as HO Universal Rail Joiners (Nickel Sil.), item 0170, 48 per pack, and HO True-Track Terminal Joiners, item 0465 source · checked 2026-09-25
Cross-brand joiner statement: not published by the manufacturer — The product page for the Universal Rail Joiners gives the pack spec and item number only; it does not state whether these joiners fit Kato or Bachmann rail. source · checked 2026-09-25
Official transition track to another brand: not published by the manufacturer — No Atlas-published transition track for joining True-Track to another manufacturer's HO or N track system turned up in this batch.

Bachmann — E-Z Track® (Nickel Silver w/ gray roadbed line) HO

Roadbed: Gray plastic roadbed (Nickel Silver product line) source · checked 2026-09-25
Rail code (HO): not published by the manufacturer — Bachmann's own shop describes this line only as “nickel silver track and gray roadbed”; the product page does not print a Code number. source · checked 2026-09-25
Joiner: not published by the manufacturer — Bachmann sells an “E-Z Track® Connector Assortment” (item 44592) for jumpering/filling gaps, but the shop does not give the standard rail joiner a product name of its own. source · checked 2026-09-25
Cross-brand joiner statement: not published by the manufacturer — No cross-brand joiner compatibility statement found on Bachmann's shop pages in this batch.
Official transition track to another brand: not published by the manufacturer — No Bachmann-published transition track for joining E-Z Track to another manufacturer's HO track system turned up in this batch.

Known gaps in this batch

Roadbed height and width (in millimeters) were not found on any of the three manufacturers' consumer product pages for this batch — that measurement usually only appears in a printed manual or has to be measured by hand, so this batch marks it not published rather than guessing.
Bachmann also sells a separate “Steel Alloy w/ black roadbed” E-Z Track line; this batch only checked the Nickel Silver w/ gray roadbed line.
Bachmann's N scale E-Z Track line was not checked in this batch (only the HO Nickel Silver line has a sourced product page here), so it is left out of the site's N scale comparisons rather than listed with guessed values.
None of the three manufacturers publish a transition track for connecting to either of the other two brands' HO or N track — not found in this batch, which is different from confirmed not to exist.