Motorists to experience traffic disruptions as a section of Lang'ata and Mombasa Road will be closed for eight hours on Sunday.
This is to allow the Kenya National Highways Authority ( Kenha) erect the Nyayo footbridge.
In a statement, Kenha's Director General Engineer Kung'u Ndung'u announced that both roads will be closed from November 14 at 5a m until 12 noon .
As Kenha will be conducting works, motorists plying the Lang'ata road will be diverted just after Madaraka Roundabout to Aerodome Road into Bunyala Roundabout .
“Kenha advises motorists to follow the proposed traffic management plan and cooperate with the police and traffic marshalls on site,” reads the statement.
Motorists have been further urged to exercise caution and road courtesy for better management of traffic .
Nairobi is undergoing a major transformation through various state projects.
The Mombasa and Lang'ata roads, Waiyaki and Uhuru highway have been experiencing long traffic jams due to construction of the Nairobi Expressway.
Thugs and muggers have also taken advantage by harassing and robbing motorists when they are stuck in traffic, especially late in the evening.
The Nairobi Expressway which is 75 per cent done will be a four-lane and six-lane dual carriageway within the existing median of Mombasa Road/Uhuru Highway/Waiyaki Way and 10 interchanges.
The expressway is being built by China Road and Bridge Corporation (CRBC) at a cost of Sh62 billion and is expected to be completed in December.
Last week, Cabinet Secretary for Transport and Roads James Macharia said that the old road will be in a better state once it is fully reopened for use next month.
He highlighted the contractors are currently done with piling and they are setting up the beams which will be done by mid-November to enable the old road to be reopened by December.
Various closed sections have already been reopened to the public as the Expressway project nears completion.
The main expressway will be opened next year in March after completing the supporting infrastructure which includes lighting and the tolling stations.
Macharia added that the ministry will start conducting test runs along the Nairobi Expressway next year March after which President Uhuru Kenyatta is expected to commission it in April.
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.