[JPBX] Caltrain #15311647

84

members (measured 13 Oct 2026, 05:58 UTC)

9 July 2022

created (per Roblox API)

10 August 2026

first measured by this register

Game studiosENrail simulatortransportationsimulation

Description

Project Peninsula is an up-and-coming rail simulator featuring realistic graphics and drivetrain systems. With over 30 types of rolling stock planned, This will be one of the biggest simulators on Roblox yet.

Written by the group; not a statement by this register.

Membership history

Growth

2 measurements spanning 30 days, net +2. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 82–84 and does not start at zero.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
12 Sept 2026, 02:34	84	+2
12 Aug 2026, 17:31	82	first reading

Ownership

Owned by grozalunatic (@JPBX914) as measured.

Groups seen changing owner — the largest ever handed over and the most recent — are on the ownership transfers board.

Members we’ve seen

grozalunatic (@JPBX914) — Owner (rank 255)

@justin5logout — Advisors (rank 254)

Comrade (@SpecialKomrade) — Advisors (rank 254)

@BakerMayfieldnum6 — Railfan (rank 1)

reteP (@georgefreaknyl911) — Railfan (rank 1)

Canadianluke (@MinecraftCleoTheCat) — Railfan (rank 1)

account_notactive (@Robloxan_RoCity) — Railfan (rank 1)

kenrailfans (@ZoStrelling145) — Railfan (rank 1)

Train (@TrainDude8901) — Railfan (rank 1)

Mr_Ellgils (@Ellgils) — Railfan (rank 1)

Norfolk_southern (@AllThingsTrains1429) — Railfan (rank 1)

@SWP737MAX — Railfan (rank 1)

@Allicouldafford — Railfan (rank 1)

Kris (@MidlandWXR) — Railfan (rank 1)

A sample — only members this register has independently measured, highest rank first. Not the full roster.

Rank structure

Owner1

Advisors2

Engineer0

Developer0

Conductor0

Member82

Railfan79

Guest0

Roles and per-rank member counts as Roblox reports them (rank 0 = guest … 255 = owner).

Related groups

Groups whose measured members overlap with this one — a sample from our membership graph.

Railway Engineering Studios#8133793 · 12 shared members

Pilot Training Club#2794513 · 7 shared members

Stepford County Railway#3620943 · 7 shared members

ROLVe#2613928 · 6 shared members

SEA Military#2648601 · 6 shared members

Pinewood Builders#159511 · 5 shared members

Quantum Science Inc.#2847031 · 5 shared members

Pacific Horizon Studios#14455797 · 5 shared members

[NJT] New Jersey Transit#4741549 · 5 shared members

Roblox Amtrak Rail Service [USA] (Amtrak)#6093302 · 5 shared members

Freeport Transit Authority#8919133 · 5 shared members

Quataun#12121240 · 4 shared members

Open data

Download this group’s measured record — free to reuse with attribution: membership history (CSV) · full record (JSON)

Each file carries its licence and retrieval time inside it, and is generated from the same measurements shown above.