This town is known as Kiserian. Kiserian is a name from the Maasai people. It mean peace. It is an action name for we are at peace. And you are right it is in SW of Nairobi. The road coming from the left hand side if from Ngong Town and the one from the town to the right hand is to Magadi town. The Soda Ash town. Magadi has the largest world deposits of Soda ash.
-courtesy of Moses Litei