Parts of Ngong Road will be closed to motorists for three days to allow for construction works.
The Kenya Urban Roads Authority (Kura) on Wednesday announced the plans to close the sections starting Thursday.
They will be reopened to motorists on Monday morning.
Kura, in a public notice, added that the 24-hour closure will enable them to carry out Asphalt Surface Course works along the sections from Box Culvert to Shell Petrol Station.
Motorists are advised to use alternative routes to access Mucai Drive and other accesses through Mbagathi Way.
The Ngong Road dualling project, launched in August last year, is estimated to cost Sh1.4 billion. Japan’s World Kaihatsu Kogyo firm is undertaking works on the first phase of the project – stretching 2.7km between the Kenya National Library and the Prestige Plaza.
Phase One was initially set for completion in July but was delayed by five months owing to challenges of shifting water and power lines.
Phase Two will cover the stretch between Prestige Plaza and Dagoretti Corner and is scheduled to start in September.
The expansion project is funded through a grant by the Japanese government under its Economic Co-operation Programme Project and is being supervised by Tokyo based Katahira and Engineers International.
— KURA (@KURAroads) August 23, 2017