Kenya National Highways Authority (KeNHA) has closed Narok-Mai Mahiu highway six kilometres from Mai Mahiu Town after severe crack emerged.
In a notice, KeNHA said the crack may have been caused by heavy rain currently being experienced in the area.
"KeNHA would like to notify motorists and the general public about the closure of Mai Mahiu - Narok Highway.
"This closure has been occasioned by a severe crack that has occured six kilometres from Mai Mahiu Town towards Mai Mahiu, cutting across the road and thus rendering the road unsafe to motorists.
"The cause of the crack has not been established, though preliminary reports attribute it to the ongoing rains.
"Further, the area has in the past been affected by similar earth movements," the authority said.
KeNHA begins restoration works
KeNHA said it has embarked on restoration works at the affected area and asked all road users plying the route to use alternative routes.
The road suggested include Narok - Kisiriri - Mau Summit - Njoro turn off (B18) to join Nakuru and other destinations.
Narok - Bomet - Kaplong (B6) road and connect to Kaplong - Kericho (B7) road.
"The authority is working round the clock to restore the damaged section of the road," KeNHA added.