Energy dependency varies by mode
Electric rail, trolley systems, battery buses and conventional fleets have different energy requirements.
Communications support operations
Dispatch, passenger information and control systems rely on data networks.
Stations connect to other systems
Lighting, elevators, drainage, fire protection and accessible paths all matter.
The first and last part of the trip matters
Walking, cycling, local bus and street networks determine whether riders can reach the service.
Scope boundary. This page explains system relationships at a planning level. Real utility, transportation, emergency, structural, electrical, cybersecurity and public-safety decisions require local agencies and qualified professionals.