@ Magigi..
there is a serious problem at hand!
A lot of people just got there first(fast) cars and have only driven(caused) into traffic Jams in the city.
The highway is another ball game altogether.
I spend quite sometime on Kenya roads every week and can tell you the danger is on the experienced motorist while trying to avoid the rookies.
Last year near xmas ,i was on the highway Naivasha- Nairobi on the 24th Dec...i counted over 5 accidents between Naivasha and Nairobi in that afternoon(majority rookies).
Drive safely guys and dont assume they have been on the highway before