The Kenya National Highways Authority has opened the closed Kahawa Sukari Drift along the Thika Superhighway that was out of bounds for the better part of the day.
The closure was necessitated by heavy flooding that rendered the road impassable.
In an update on the State of the road Wednesday evening, KeNHA said the road is now safe for traffic.
"The previous temporary closure due to traffic has been lifted and road users can now access the road safely," KeNHA said.
The closure of Kahawa Sukari Drift saw motorists heading to Thika use Kiambu Road and turn off to the Northern Bypass to Ruiru and vice versa.
Many people were Wednesday morning stranded after Thika Road flooded at Kenyatta University and Juja.
Traffic flow along the Thika Super Highway was affected after a section of the highway was submerged by water, particularly the Thika bound on the underpass of the Juja Flyover area.
Motorists were using Service Lane to access the highway past the High Point area.
Also submerged are Traffic Police Offices within Juja Police Station.
Police are said to have turned away motorists on both sides of the road to avert a tragedy.
Police appealed to motorists to exercise due caution when using the Juja Super Highway.
Motor vehicles from Nairobi heading towards Thika were making u-turns and coming back to the Githurai roundabout.
No motor vehicles were heading to Nairobi from Thika.