Research draft

interchange

vr.tr.interchange · PHY.BLT

Let an agent handle interchanges by type, location, navigation and safety.

Thing Registry Physical world and living systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent handle interchanges by type, location, navigation and safety.

A road junction using grade separation, with bridges or tunnels and ramps, so that traffic can move between roads without crossing at the same level; types include cloverleaf, diamond, trumpet and stack interchanges.

What it is for: Connecting high-speed roads efficiently.

It can be identify interchange types; explain lane choice and exits; find junction numbers and roadworks; understand safety features.

Distinguishing features

Grade-separated

High capacity

Many designs

Large land area

What it looks like

Ramps, loops and bridges connecting motorways or major roads.

How it is recognised

Grade separation with ramps

Junction numbers on signs

At-grade intersections are different

Related models

is a kind of - category

road junction and transport structure

connects - roads

motorway

is contrasted with - at-grade

intersection

uses - structure

bridge

In practice

Families and kinds

cloverleaf interchanges

diamond and diverging diamond interchanges

trumpet interchanges

stack interchanges

smart and free-flow interchanges

Standards and regulation

Road design standards

Signing standards

Failure modes and hazards

Late lane changes

Wrong-way driving on ramps

Weaving conflicts

Also called

cloverleaf interchangesmart interchangetrumpet interchangediverging diamond interchangeFree-flow interchangespaghetti junctionincomplete interchangepartial cloverleaf interchangeCloverstack interchangewindmill interchangestack interchangeturbine interchangeroundabout interchangeThree-level diamond interchange

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Type Which interchange.

Types differ.

Design

Form.

Design

Interchange design.

What type of interchange is it? definition
Which roads does it connect? provenance

Number

Junction number.

Number

Junction number.

What is the junction number or name? provenance
Which authority manages it? provenance

Navigation Using it.

Lane choice matters.

Lanes

Choice.

Lanes

Lane choice.

Which lane should be used for this exit? action
How far ahead is it signed? measurement

Works

Closures.

Works

Roadworks.

Are there roadworks or closures at this interchange? provenance
Which official traffic service reports them? provenance

Safety Risks.

Interchanges have specific risks.

Wrong-way

Driving.

Wrong-way

Wrong-way driving.

What should a driver do if they see a wrong-way vehicle? action
Which emergency number applies? provenance

Weaving

Merging.

Weaving

Merging.

How should drivers merge safely on ramps? action
What does the highway code say? provenance

Engineering Design.

Design shapes capacity.

Capacity

Traffic flow.

Capacity

Capacity.

What traffic volumes does it handle? measurement
Is it congested? provenance

History

Notable junctions.

History

History.

When was it built, and has it been redesigned? provenance
Is it a notable example such as a spaghetti junction? provenance

What the second pass must settle

Should interchange types be separate entries?
How should junction numbers be linked?
How should roadworks data be linked?

Draft as JSON