Charles Kyalo, a bus driver on this route, confirmed that the road would be ready for use within a few days.
The falling rocks are due to the recent heavy downpour experienced in the area.
The disruption has left hundreds of travelers stranded, highlighting the critical need for immediate repairs to restore connectivity.
KeNHA cautioned that the river is nearing overflow, posing a danger to road users.
KeNHA also assured the public that repairs were already underway to address any damage caused by the flooding.
KeNHA urged motorists plying that route to use alternative routes for their safety.
The auuthority said the sudden siltation occured at Suswa area, about 27 kilometres from Mai Mahiu town towards Narok.
The Kenya National Highways Authority (KeNHA) officially closed the road, deeming it unsafe for motorists and pedestrians due to flooding.
Motorists plying Madogo-Hola (B89) Road should anticipate flooding at Dukanotu and Bilbil Bridge, KeNHA says.
The most affected areas were Tula and Arer, a few kilometres to Bangale town.
Kenya Meteorological Department Director General, David Gikungu, also warned the country to anticipate heavy rainfall over the next three months.
KeNHA at the same time issued a flooding alert at the Mororo Area on the Nairobi - Garissa Road due to the rising waters at Tana River Bridge.
According to KeNHA, the road will close to make room for the construction of a pedestrian tunnel connecting the University of Nairobi Main Campus and the Chiromo Campus.
Governor Abdi said the road construction will bring immense socio-economic benefits to Isiolo residents.
The delays in clearing the pending bills have been cited as the cause of slowed progress of works resulting in delayed project completion.
Kenya had 526 state agencies by June 2023, which was an increase from 500 agencies the previous year.
The licensing and establishment of roadside stations is one of the strategies by KeNHA to diversify its revenue streams.
Motorists who don’t want to pay for road use were told to use alternative roads.
The Kenya National Highways Authority (KeNHA) has announced a temporary closure of the Nairobi Southern Bypass affecting both bounds between Lang'ata interchange and Ngong interchange.
