Public Transit
Public Transit sits in the Mobility phase of CityOS — AJG's synthesis of municipal-administration practice across 1,584 tracked cities. Mass-transit modes serve 30-80% of trips in well-served cities. Tokyo (87% transit modal share), HK (90%), Singapore (75%), London (45%), NYC (56%), Mumbai (52% suburban rail). Metro capex USD 100-500M/km; BRT 1-50M/km. Operating subsidy typical: 20-60% of revenue. Scale: USD 100M - 50B per metro project. Time horizon: 5-15 yr per line. Multilateral coverage: 197 countries × 1,584 cities (T1/T2/T3).
Primary actors
8-Slice Lifecycle Map
Every public transit decision touches each of these lifecycle slices. Click through to deep-dive each.
Other Mobility-phase categories
All 6 CityOS phases
Need to apply public transit frameworks to a specific city, project, or comparison? AJG's 1,584-city dataset surfaces benchmarks and reference implementations.
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Frequently asked about Public Transit
What is the typical scale of Public Transit?
USD 100M - 50B per metro project
How long does public transit take?
5-15 yr per line
Who are the primary actors involved?
metro-mta, state-central-funding, jicaadb, urban-development-ministry.
Does Public Transit apply across all 197 countries?
CityOS is multilateral by construction. Frameworks adapt to legal, fiscal, and institutional context — but the structural slices are universal. City-specific applications surface via /os/cityos/country/{country}/.
How does this relate to AJG's broader platform?
CityOS complements TradeOS (operations) and GovOS (rules) by adding the urban-management lens. Cross-OS quadruples — DealOS × TradeOS × GovOS × CityOS — surface strategic + operational + regulatory + spatial views together.