You're almost getting it unlike Uhuru and Ruto. Nairobi subway is a no-brainer, not sure what bryan et al are arguing about. The man-hours spent in commute alone are quantifiable as a fraction of the Kenyan economy.
If Uhuru and our fake genius Dr Hustler - had an iota of brains - they would go for subway in Nairobi - optimize mobility for the Nbo-Macha-Kajiado-Kiambu metropolis. That can have proper return. Billions wasted in traffic in Nairobi have been quantified by WB, IMF, IBM, etc - numerously.
Simple math - Nairobi GDP x 4/12 hrs folks waste on the roads daily.
It's a hanging fruit - very exciting obvious opportunity - except to the hare-brained Jubilee.
Planning.. we need real thinkers to re-imagine Nairobi. Not fools like Kidero or Sonko. London is a good example with its "tube" which runs across every corner of the city. The cross-English channel traffic would be crazy without the rail. Addis rail must have copied this. Amsterdam also has a great rail system.. the EU is a good place to study cross-urban infrastructure - with fast easy commute across Ams, Paris, Brussels, Frankfurt and name it. But Chinese are the best cheap builders. If wishes were horses we would build our own rail of course.
Design - New York City is a good example. Trump owns a "penthouse" smack in the CBD. Condominia are hot cake - cause most execs rather work at say KICC and live at Times Tower than commute. It is an outdated model that folks must live in the outskirts and work in CBD - what on earth for?? County can work with Housing Ministry to craft smart policy. You open a commercial in CBD we charge an arm n a leg like betting. You open commercial in the outskirts we subsidize or at least waive the levies. Same treat for residential - promote decentralization and kill the mental block - ati hapa ni town huko ni estate.
The "town" model is troublesome when poorly planned. There ought to be strict standards in any town, of free space that must be set aside for trees, free movement, parking, before any skyscrapers or high rise building is put up. You should be allowed to only build in a fraction of the land you own. This is the case in alot of the cities in the west.
The problem with CBD is it acting like a huge bus and matatu terminus..not gov office.The solution is railway terminus radiating like a star network and more ring roads circling Nairobi...for road traffic.Also building huge apartments high rises around CBD for people working in CBD like the Ederman 8 34 floors river estate with will ease the mass movement of people.There are lots of gov land near Nairobi towards Eastland that Chinese can turn into mass housing that would be within a walking distance to CBD.