intersection
Let an agent handle road intersections by type, control, rules, safety for all users and design standards.
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 road intersections by type, control, rules, safety for all users and design standards.
A road junction where two or more roads meet or cross at grade, controlled by priority rules, stop or give-way signs, traffic signals or roundabouts, with provision for pedestrians and cyclists.
What it is for: Allowing traffic to cross or turn safely.
It can be explain right-of-way rules; identify intersection types; find safety data and improvements; report dangerous junctions.
Distinguishing features
At-grade crossing of roads
Controlled by rules or signals
Conflict points for users
Common crash locations
What it looks like
Roads meeting with markings, signs, signals, crossings and islands.
How it is recognised
Stop and give-way signs, signals
Pedestrian crossings and cycle lanes
Grade-separated interchanges are different
Related models
is a kind of - category
is controlled by - control
is contrasted with - grade-separated
includes - feature
In practice
Families and kinds
T-junctions and crossroads
signalised intersections
all-way stops
roundabouts (related)
pedestrian scrambles and cycling intersections
Standards and regulation
Vienna Convention on Road Signs and Signals
National highway codes
Road design standards
Failure modes and hazards
Collisions from failing to give way
Pedestrian and cyclist injuries
Poor visibility
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.intersection-group
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 junction.
Types differ.
Layout
Form.
Layout
Layout.
- What type of intersection is it? definition
- How is it controlled? definition
Location
Where.
Location
Location.
- Where is the intersection? provenance
- Which authority manages it? provenance
Rules Right of way.
Rules decide priority.
Priority
Who goes first.
Priority
Right of way.
- Who has right of way here, according to the highway code? provenance
- How do signals change it? definition
Vulnerable users
Pedestrians and cyclists.
Vulnerable users
Vulnerable road users.
- What rules protect pedestrians and cyclists here? provenance
- Where should they cross? provenance
Safety Crashes.
Junctions are risky.
Data
Crash records.
Data
Crash data.
- What do official crash records show for this junction? provenance
- What measures could improve it? provenance
Report
Hazards.
Report
Reporting hazards.
- How can a faulty signal or dangerous junction be reported? action
- To which authority? provenance
Design Engineering.
Design reduces conflicts.
Standards
Guidance.
Standards
Design standards.
- Which design standard applies? provenance
- How are sight lines set? measurement
Options
Alternatives.
Options
Design options.
- Would a roundabout or protected junction be safer? provenance
- What evidence supports it? boundary
What the second pass must settle
- Should intersection types be separate entries?
- How should highway codes be linked?
- How should crash data be sourced?