01 Line-up & test
Self-test brakes, comms, and pantograph before entering traffic.
Scores are relative 0–100 marks within this atlas. Use them to browse, not as an engineering spec.
SpeedPractical top speed relative to the other forty-eight types in this atlas.
52
EfficiencyEnergy used per useful trip, relative across the atlas.
80
AccessibilityHow easily an ordinary person can use this mode without special training or wealth.
85
SafetyHow safe the mode is per trip, given normal operation and current regulation.
82
Cultural impactHow deeply this mode has shaped language, status and everyday imagination.
62
Tech disruptionHow much this mode is being rewritten by new technology right now.
55
Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Which local authority or corridor rules matter for this type?
Start with the local lens: type approval, operator licences and the hubs named on this page — not a single global checklist.
Is this a buying guide?
No. Tool-Lifes /vehicles is an educational atlas. It explains history, systems and culture without affiliate rankings.
Are the scores official?
No. The six scores are relative editorial 0–100 marks across the 40 types on this site.
Where do the photos come from?
Lead images resolve from Wikimedia Commons via Wikipedia titles on the English masters, with licences recorded on the credits page.
Why metric units?
Metric is the default. Regional notes (US customary, local brand culture) appear in culture and market chapters.
How is this different from a wiki article?
Each type gets seven fixed-depth chapters, comparable scores and cross-type labs — structured for browsing, not a single freeform page.
Operating a Light rail is a closed loop: sense, decide, actuate, and stay inside certified envelopes.
Principles and steps here are physics-first; brand procedures differ, but the envelopes are shared.
Principles
Mode split ROW
Schedule reliability mixes with traffic delay on street segments.
Acceleration vs comfort
Commuter loads accept higher jerk than legacy streetcars.
Regenerative substation
Energy returned only if another train loads or storage absorbs it.
Proof-of-payment risk
Fare evasion managed by inspection sampling, not gates.
Platform curvature
Gap increases on curved platforms—door masking or selective opening used.
Diagrams
Substation to axle
Substationsource
Feederdistribute
Pantographcollect
Inverterconvert
Motordrive
Scheduleservice
Priority at crossing
Transponderannounce
Signal controllerdecide
Green extgrant
LRV clearsverify
Releasetraffic
Operating steps
02 Station sprint
Accelerate quickly on ROW segments to maintain headway.
03 Street vigilance
Scan for turning vehicles at shared intersections.
04 Passenger flow
All-door boarding where policy allows; monitor load via CCTV.
05 Express overtake
Use passing sidings if local/express service pattern applies.
06 End-of-line turn
Operator walks cab or auto-reverses at stub terminals.
Hard limits
Mixed-traffic segments
Legal speed may match autos—timetables include congestion padding.
Platform ADA gap
Boarding aids required where horizontal gap exceeds standard.
Block occupancy
ABS blocks prevent following train entering occupied section.
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