Transit-Threads

threads of transportation, urban mobility, and the politics of getting around


Tokyo: one city, one action, one output

Dense rails, a synthetic freight population, operators who already have dashboards. The world-model product here is what happens to the corridor after you close a line — not whether you can forecast the next train.

6 min read   ·   2026

Bangkok: one city, one action, one output

Sparse data, monsoon physics, a fractured transit graph. The world-model product here is not a robotaxi clip — it is crowding three hours after a flood, a concert, or a motorcade.

5 min read   ·   2026

World models are the next layer for mobility

Not the next 15 minutes of traffic — how the city evolves under actions. Predict, simulate, plan. What 2025–26 actually built, and the product-shaped hole that is left.

10 min read   ·   2026

Code is the lab notebook

Python, R, and a graph of Bangkok — how the research actually runs, from A* on the network to FEM dumps into XGBoost.

4 min read   ·   2026

How I actually do the research

Geography first, an operational question second, a model third — and a citywide elasticity last, if at all.

4 min read   ·   2026

JR: past, present, and future

The 1987 JNR split in numbers — what closed, what listed, what the state still pays, and which parts of the reform are unfinished.

11 min read   ·   2026

If you privatize public transport, be like JR

Privatization is not the point. Vertical integration, regional companies, and stations that can earn a living are. Japan did that in 1987. The UK did the opposite.

7 min read   ·   2026

Mixed-Use Development and Sustainable Mobility in Thailand

How transit-oriented development around major hubs can transform Bangkok's urban landscape while respecting car culture

5 min read   ·   2025