A section of Thika Road. /FILE
The closure, according to the agency boss Kung’u Ndungu, will take place during night time from Friday, April 11 to Monday, April 14.
The maintenance will happen between 11pm and 4am, KeNHA said.
During the period, motorists traveling between Nairobi and Thika are advised to use the designated service lanes.
To ensure free movement of traffic, the authority has created diversion plans with traffic marshals on call to direct motorists.
“KeNHA advises all road motorists to follow traffic management plan, project road signs and cooperate with the police and traffic marshals on site,” reads the notice.
The planned maintenance works is part of the the authority’s routine mandate to ensure the state of road infrastructure is improved.
The Thika superhighway has been instrumental in opening up the capital city to better business and social opportunities and in handling traffic to and from the Central Business District (CBD).
It is a 50-kilometer, 8-to-12 lane road.
It was constructed during the late President Mwai Kibaki's tenure as part of efforts to ease traffic congestion between Nairobi and Thika town.
The highway was completed in 2012 after construction began in 2009.
The project involved expanding the four-lane road that had been in place for decades into an eight-lane modern highway, with flyovers and underpasses replacing roundabout.
The project was funded by loans from the African Development Bank $180 million (Sh23bn by current exchange rate) the Exim Bank of China $100 million (Sh12.9bn), and the Kenyan government $80 million (Sh10.3bn).
