Critical infrastructure guide
Public Transit Systems
Vehicles, stations, power, control, maintenance and passenger information.
Systems note: infrastructure classifications, standards and responsibilities vary by country and operator. Use current local requirements for real decisions.
Why this matters
Vehicles, stations, power, control, maintenance and passenger information.
Core system ideas
Transit continuity affects workforce access and mobility for people without alternatives.
Electric rail and bus systems can have strong power and communications dependencies.
Service recovery may use partial routes or replacement modes when infrastructure is damaged.
What to review
Useful reviews usually combine service criticality, dependencies, condition, capacity, maintenance, alternate arrangements, restoration time and clear ownership rather than relying on one isolated metric.