Motorists who regularly use Mombasa Road, Uhuru Highway and Waiyaki Way will in the next seven months face interruptions as construction of the Sh59 billion Nairobi Expressway takes shape.
The roads were closed on September 26 and will be reopened on April 1, 2021.
"Motorists are asked to follow directions as on road signs and provided by traffic marshals," says a public notice signed by Peter Mundinia, Director-General of the Kenya National Highway Authority (KeNHA).
The notice added that the agency will pull down the St Mark's footbridge along Waiyaki Way, which will be closed from Goodman Towers opposite St Marks Anglican Church to Sanlam Towers some 500 metres away.
Motorists from the city centre were advised to turn left into Service Road before the St Mark's footbridge and rejoin Waiyaki Way after Mvuli Road.
Pedestrians were advised to use the designated crossing in front of Park Inn Hotel.
The 27km highway, which starts at Mlolongo, connects the Jomo Kenyatta International Airport (JKIA) to the city centre and terminates at James Gichuru Road in Westlands.
It will have a four-lane and six-lane dual carriageway within the existing median of Mombasa Road, Uhuru Highway, and Waiyaki Way as well as 10 interchanges.
The section between the Eastern and Southern bypasses will be a six-lane dual carriageway while the section from to the Eastern Bypass and that from the Southern Bypass to James Gichuru will be a four-lane dual carriageway.
The elevated highway will begin near Ole Sereni Hotel and run through the CBD along Uhuru highway up to James Gichuru junction.
Haile Selassie Road, Kenyatta Avenue and University Way will be below the elevated road.