lift
Let an agent handle lift bridges by mechanism, clearance, operating schedule and safety, as a kind of movable bridge.
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: Claude
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Mechanism How it lifts.
Machinery
Towers, cables, counterweights.
Machinery
The lifting system.
- How is the span lifted? definition
- How is it powered? definition
Clearance
Heights up and down.
Clearance
Navigational clearances.
- What are the clearances when down and raised? measurement
- How wide is the navigation channel? measurement
Operation When it lifts.
Schedule
Opening times.
Schedule
Lift schedule.
- When does the bridge lift, and on request? definition
- How long does a lift take? measurement
Operator
Who operates it.
Operator
Operating authority.
- Who operates the bridge, and how is it contacted by vessels? provenance
- Which radio channel is used? definition
Safety Barriers and failures.
Barriers
Traffic control.
Barriers
Traffic safety systems.
- Which barriers and signals stop traffic? definition
- Are they interlocked with the lift? boundary
Failure
Stuck spans.
Failure plan
Response to failure.
- What happens if the span cannot be lowered? action
- How are road users diverted? action
Condition Inspection.
Inspection
Structure and machinery.
Inspection
Latest inspection.
- When were the structure and machinery last inspected? provenance
- What defects were found? measurement
Heritage
Historic bridges.
Heritage
Protection status.
- Is the bridge protected as heritage? provenance
- What limits apply to modernisation? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.BLT
What it is Filled
A movable bridge whose span rises vertically while remaining horizontal, lifted by counterweights and machinery in towers at each end to let ships pass.
Why it exists Filled
Let an agent handle lift bridges by mechanism, clearance, operating schedule and safety, as a kind of movable bridge.
Distinguishing features Filled
- Span lifts vertically, staying level
- Needs towers and counterweights
- Interrupts road or rail traffic when raised
- The lift as an elevator is a different entry
What robots and AI may and may not do Filled
Must not
- Raise or lower the span while road or path barriers are open or people are on the deck.
- Operate the bridge without the operator's authority or outside navigation rules.
- Override interlocks, limit switches or counterweight safeguards.
- Give vessels clearance information it has not confirmed with the operator.
Only with a human decision
- Opening or closing the span.
- Holding traffic or vessels during a fault or emergency.
May
- Report a lift bridge's opening schedule, clearance and status from its operator's notices.
- Monitor span position, barriers and machinery on a bridge it is authorized to supervise, and alert the operator.
Moral aspects Filled
- A moving span puts road users and vessels at risk if timing or barriers fail.
- Bridge openings shift delay between road and waterway users.
Who is affected
- Road users and pedestrians
- Vessel crews
- Bridge operators
Owners Filled
Steward
The bridge owner and operator, usually a road or waterway authority.
Master systems
- Bridge and structure inventories of the road or waterway authority
Links to other meta-models Filled
parent
- Q12280 - registry parent class
related
- bridge - movable bridge
- bascule bridge - span pivots up
- lift as elevator - a homonym
- waterway navigation - vessel passage
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.lift-q2953023
- Wikidata: Q2953023 (https://www.wikidata.org/wiki/Q2953023)
Direct properties required Filled
- lift height: 10-60 m
- span: 30-170 m
Recognition required Filled
- Two towers flanking a span
- Cables and counterweights in the towers
- Bascule and swing bridges move differently
- A horizontal span between two towers, which rises straight up on cables with counterweights.
Capabilities and actions required Filled
- cross it, when down
- raise it, for vessels, under operating rules
- inspect and maintain its machinery
- check lifting schedules
Hazards and failure modes required Filled
- Mechanical failure leaving the span stuck
- Vessel strikes
- Traffic queues and barrier accidents
Standards and interfaces required Filled
- Bridge design codes such as AASHTO movable bridge specifications
- Navigation rules for opening bridges
- Machinery and electrical safety standards
Context of use required Filled
- Carrying road or rail over navigable water while allowing tall vessels through.
- vertical-lift road bridges
- vertical-lift rail bridges
- table bridges
- submersible bridges as a rare variant
Sources Filled
- Wikidata item Q2953023: lift - identity and sense of the item
- Wikipedia (nl): Til - general description of the item
Open questions
- Should movable bridge types be separate entries?
- How should lift schedules be exposed to routing agents?
- The registry entry has no aliases; is the bridge sense the one intended?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q2953023/spec.json