I've used the train a few times, I can tell you it's usually very full

It's 1 trip in the morning & one jioni only

Improvement of rail services by increasing trips and expanding rail services to unserved areas would greatly ease the traffic mess

“Nairobi is our international city… Tuwache kufanya siasa na hii maneno pia naona drill zinafanywa hata airport, kwa malls kuji prepare against disasters kwa hivyo hata nairobi nilikua nataka kujaribu tuone kama… na bado, tunajipanga na tukiwa tayari na ile mradi wa BRT, tayari lanes tumetengeneza… (I see safety drills carried out in airports and malls and so in Nairobi, I was just trying to see…)

The Governor warned that Nairobi residents must get used to walking to the city centre so that order is restored.

“Kutembea ni exercise na bado mtatembea tena. Tutachunga masilahi ya wale wamama wako na mimba, the physically challenged and the elderly. It is only one kilometer from railways to the CBD. Kama Governor, sitakubali laziness, mtatembea na mtatembea tena,” he vowed. (Walking is good exercise, we will just look after the pregnant, physically challenged and the elderly… As governor, I will not allow laziness, you will walk and will more some more.)

This what they achieved in making you believe but actually if you remove the matatus let's say from 50 km from CBD Nairobi introduced a proper public transport system you will realize they are not an efficient distribution mechanism. There are enough reports on this done by experts gathering dust in some govt offices. You will realize that transport costs in Nairobi are much higher than more developed cities like Hong Kong

How to fix the transport jam problem FOREVER. The solution is to reduce the number of lanes on a road, not expanding them.

Roundabouts move traffic through an intersection more quickly, and with less congestion on approaching roads. Roundabouts promote a continuous flow of traffic. Unlike intersections with traffic signals, drivers don’t have to wait for a green light at a roundabout to get through the intersection. Traffic is not required to stop – only yield – so the intersection can handle more traffic in the same amount of time.