Ruto admitted to government excesses during his New Year's address, promising action.
The return trips are set to ease the travel of Kenyans returning to the capital city ahead of school reopening.
Motorists have raised alarm over the blatant corruption on the roads.
Traders are counting losses over the products that have been stuck for a month.
The fighting could slow the processing of land issues within the two counties.
The AUC chairpersonship election will take place during the 38th AU Summit in Addis Ababa in February.
Civil Society groups have asked the High Court to refer abduction cases to the International Criminal Court (ICC).
The Ethics and Anticorruption Commission has arrested nine traffic police officers caught extorting money from motorists in Nakuru, Kajiado and Kisii.
The Directorate of Criminal Investigations (DCI) says influencer Francis Gaitho is wanted for alleged criminal activities.
Three men were on Thursday shot dead in a fierce battle over a disputed land in the Kerio Valley, a region also ravaged by banditry.