Railway headway & capacity simulation

The most accurate way to your best headway.

Best Headway models real trainborne and trackside signalling logic and Rolling Stock physics, entirely in your browser. No black box — just answers.

TIME–DISTANCE, ACTUAL RUN 4 trains · sim_log
05:59 06:12 28.1km 24.9km ≈2 min headway
The pipeline

Seven stages, one Interface

Each module reads a clean input and writes a clean output — chain the full pipeline, or run any stage on its own.

01
Track Layout
Lay out your network.
02
System Parameters
Everything can be configured.
03
Route Info
How trains move from signal to signal.
04
Scenario Builder
Set the timetable.
05
Interlocking
Works whether it's CBTC or train-to-train.
06
Simulation Engine
Watch every train run, tick by tick.
07
Results
Analyze and validate everything.
Capabilities

Built for real headway analysis

a physics-based engine, editable data at every stage, and diagrams built for the questions operators actually ask.

Δv

Real kinematics

SUVAT displacement, speed and chainage updates every tick — not linear approximations.

t

Discrete-time engine

A configurable tick interval drives every train's state machine from departure to terminus.

▤

Time–distance diagrams

See headway, conflicts and spacing across the whole timetable at a glance.

⇄

Interlocking-aware

Interlocking rules that work exactly like the real signalling system.

✎

Editable at every step

Routes, sections and scenarios are inline-editable tables with live validation.

◯

Zero install

Pure client-side. No server, no build step, no account — open it and run.

Who it's for

Built alongside the people who care about railways.

Operations

Transit authorities

Pressure-test headway and capacity assumptions on your railway network before committing to a timetable.

Consultancy

Engineering firms

Run fast, repeatable capacity and signalling studies across client engagements.

Vendors

Rolling stock & signalling

Demonstrate the headway performance of your systems with data, not slideware.

Academia

Research & teaching

A transparent, inspectable physics model for coursework and rail operations research.

Curious what it looks like on your network?

Send a note and we'll walk you through a run on a scenario close to yours.

Contact us →