rapid transit
Enable an AI agent to recognise a rapid-transit system, assess its ability to move passengers reliably and safely, and identify feasible interventions within recorded operating constraints.
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.
Researched by: Codex
Purpose and description
Enable an AI agent to recognise a rapid-transit system, assess its ability to move passengers reliably and safely, and identify feasible interventions within recorded operating constraints.
It can be Determine whether a proposed passenger movement is supported at a specified time, including transfers and access requirements.; Locate shared segments, junctions, platforms or turnbacks that constrain a proposed service pattern.; Compare planned service, delivered service and passenger loading to identify a service shortfall.; Trace an infrastructure or fleet restriction to affected routes, stations and accessible paths.; Evaluate candidate frequency changes, short workings, closures or replacement connections against recorded capacity and operating rules.; Prepare a disruption or restoration recommendation for the responsible authority, stating evidence gaps and required checks..
Distinguishing features
Test the extent to which passenger movement has an exclusive right of way and whether road crossings or mixed traffic constrain operation; speed or branding alone does not establish the boundary.
Test whether service supports repeated station-to-station travel across an urban area, rather than primarily long-distance or peak-direction regional journeys.
Test actual service intervals and operating periods before treating the system as usable without planning around a particular departure; retain the observed values rather than assuming a universal frequency threshold.
Test whether routes, stations and movement control form an integrated operating system, rather than a single vehicle, an isolated guideway or an advertised service name.
For light rail, bus rapid transit and automated people movers, record the operating characteristics that support or challenge inclusion instead of deciding from the mode label.
Scope
+ System boundary, constituent lines and relationship between advertised routes and physical infrastructure
+ Right-of-way separation, junction conflicts and station configuration
+ Service patterns, operating periods, headways and passenger-carrying capability
+ Passenger access, interchange and continuity of accessible journeys
+ Infrastructure and fleet availability, degraded operation and recovery constraints
- Detailed engineering and maintenance records for individual vehicles, tracks, signals, lifts and other component assets
- The operator's corporate governance, staffing establishment and financial accounts
- Regional travel demand and the complete multimodal transport network
- Individual passenger journeys, tickets, payments and personal records
- Neighbourhood land use, property development and wider urban economic effects
Characteristics
- Mode and classification basis
- Recorded technology and local classification, with evidence and unresolved boundary flags Prevents an ambiguous registry label from silently determining which systems qualify.
- Right-of-way separation
- By segment: grade-separated exclusive, exclusive with level crossings, mixed traffic, or unknown Exposes external conflicts that affect service regularity and permissible operation.
- Route-to-infrastructure mapping
- Passenger routes linked to station sequences, physical segments, junctions and turnbacks Shows which services share a constraint and which diversions or short workings are physically possible.
- Service headway
- Minutes between departures, by direction, segment and time period; distinguish planned and observed Supports assessment of waiting time, service gaps and uneven spacing.
- Operating window
- First and last usable departures by station, direction, calendar and time zone Determines when a passenger movement or interchange can actually be completed.
- Passenger-carrying capability
- Passengers per hour per direction at a named segment, with vehicle loading and service-frequency assumptions Allows demand and proposed service changes to be judged against a stated capacity basis.
- Passenger loading
- Passengers per vehicle or platform and percentage of a stated capacity, with location and observation time Identifies crowding and distinguishes observed loading from theoretical capacity.
- Accessible journey continuity
- Available, restricted, unavailable or unknown for a specified entrance-to-platform-to-vehicle-to-exit path and access requirement A station-level accessibility label cannot establish whether a complete journey is currently possible.
- Operational availability
- Normal, restricted, suspended, under recovery or unknown, by affected service and infrastructure segment Connects a disruption to the passenger services and movements it prevents.
- Service delivery
- Delivered versus planned departures and observed headway variation over a specified interval Distinguishes a published timetable from service passengers can rely on.
- Operating authority
- Responsible bodies and roles linked to movement control, closures, maintenance access and restoration decisions Separates technically possible interventions from actions an agent or operator is authorised to take.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 10 layers · 10 findings · 20 questions.
System identity and boundary Establishes what the registered rapid-transit thing includes and how it differs from neighbouring transport systems.
An agent must identify the operational thing before combining observations or proposing changes across its parts.
Classification evidence
Records the operating characteristics and source definitions behind inclusion as rapid transit.
Rapid-transit inclusion
A supported classification decision with disputed or unresolved criteria retained explicitly.
- Which combination of right-of-way separation, service pattern and urban passenger function supports treating this system as rapid transit? definition
- Which registry or authoritative transport definition establishes whether this entry includes bus rapid transit, light rail or people movers? provenance
Operational extent
Separates the integrated system from its branded services, individual lines and connecting networks.
System membership
The lines, stations and shared facilities included in the system, with interfaces to separately managed systems.
- Which lines, stations, depots and control facilities are constituents, and which are external connections or shared dependencies? boundary
- Where do branding, ownership, fare integration and operational control imply different system boundaries? boundary
Guideway and route configuration Describes where vehicles can move and how passenger routes use the physical network.
Route maps alone cannot establish conflict exposure, shared bottlenecks or feasible changes to service.
Right of way and conflicts
Locates exclusive running sections and interfaces with other movements.
Movement conflict exposure
Segment-level separation and crossing conditions relevant to safe and regular operation.
- Which segments are grade-separated, cross other movements at level or share running space with other traffic? measurement
- What documented priority, protection or operating restrictions apply at each conflict point? provenance
Route topology and turnbacks
Links advertised services to actual paths, junctions, platforms and reversal facilities.
Feasible service paths
The physical paths and reversal options available for normal and altered service.
- Which routes share tracks or lanes, junctions, station berths and terminal reversal facilities? boundary
- Where can services terminate early, reverse, bypass a station or divert, and what restrictions govern each option? action
Service and passenger throughput Connects scheduled and delivered service to passenger-carrying capability and loading.
An agent must distinguish nominal service from the frequency and capacity available at the location and time of a decision.
Service pattern and delivery
Records where and when services run and how observed departures compare with the plan.
Usable service offer
Direction-specific operating windows, stopping patterns and departure intervals with observed delivery.
- What stopping patterns, first and last departures, and planned headways apply by branch, direction and service calendar? measurement
- What observed departure gaps, cancellations and headway variation occurred over the assessment period? measurement
Capacity and loading
Relates vehicle capacity and achievable service frequency to demand at specific locations.
Binding throughput constraint
The evidenced limit on passenger throughput, including its assumptions and current loading.
- What passenger throughput is supported at the critical segment, using which vehicle capacity, loading standard and achievable departure rate? measurement
- Would the proposed service increase be limited by fleet availability, movement separation, junction conflicts, dwell time, platform clearance or terminal reversal? action
Station access and interchange Represents the passenger paths that make the rapid-transit service reachable and usable.
A running service provides little usable capability when passengers cannot reach its platform, board or complete a transfer.
Accessible boarding paths
Connects entrances, circulation facilities, platforms and vehicle boarding interfaces.
Continuous access path
The availability of a complete station and boarding path for a stated passenger access requirement.
- Which entrance-to-vehicle paths meet the specified access requirement, including level changes, platform gaps and any required assistance? boundary
- Which lift failures, entrance closures or boarding restrictions currently break those paths, and when was their state verified? measurement
Transfers and platform circulation
Records transfer paths and station circulation constraints that affect practical connectivity.
Usable interchange
Whether a mapped connection can be completed under current timing, access and crowding conditions.
- What walking time, level changes, fare-boundary crossings and operating-hour restrictions apply to each interchange path? measurement
- Under what recorded crowding or closure conditions must entry, transfer movements or platform access be restricted or redirected? action
Operating readiness and recovery Connects critical dependencies and operating restrictions to permitted service and restoration decisions.
Physical connectivity does not establish that a movement is currently safe, supported or authorised.
Critical operating dependencies
Identifies the fleet, power, control and infrastructure capabilities required by each service section.
Service readiness
An evidence-backed assessment of whether the required operating capabilities are available.
- Which fleet, power supply, movement-control, communications and station capabilities are required to operate each section? boundary
- Which dependencies are unavailable or restricted, what services are affected, and how current is the supporting status evidence? measurement
Degraded operation and restoration
Records permitted responses to disruption and the conditions for returning to service.
Permitted response and release
Applicable degraded-service options, decision authorities and restoration checks.
- Which documented degraded modes, section closures, short workings or passenger evacuation arrangements apply to the observed failure? action
- Who may authorise the response and subsequent reopening, and what inspections, tests or operating confirmations must precede restoration? action
What the second pass must settle
- Does vr.tr.rapid-transit denote a rail metro system specifically, or a functional class that also includes qualifying bus rapid transit, light rail and people movers?
- Does an existing Vercy world model already own this concept or a substantial part of its system-level scope?
- What evidence should resolve system boundaries when branding, fare integration, physical connections and operating control disagree?
- Which capacity, accessibility and service-regularity definitions should be adopted, and which must remain jurisdiction-specific?
- Which authoritative operating sources and live status feeds are available, and how should evidence age limit an agent's recommendations?