Hundreds of passengers failed to reach their destination on time following a traffic snarl-up on the Nairobi-Nakuru highway that lasted for more than ten hours.

The traffic at the Gilgil weighbridge stretched for 15km on both sides of the road. In the traffic, a trailer rolled backwards ramming into three vehicles including a bus ferrying school children injuring scores of them.

The traffic was caused after the weighbridge broke down forcing trailers to overlap and block the section. A witness, James Kimani, said it took him eight hours to drive from Naivasha to Nakuru.

He said confusion on the road was cause truck drivers. Kimani said the few traffic officers at the scene were overwhelmed. He said one of the trailers parked on a hilly section of the road rolled backwards ramming into three vehicles.

Naivasha OCPD Charles Kortok said the trailer hit two personal vehicles and a bus that was carrying school children from Uganda. The police boss said about ten people sustained minor injuries and were treated and discharged.

"The trailers drivers did not want to give way and the situation saw a three lane created making the situation even worse," he said. The jam was later cleared ten hours after it started as the smooth flow of traffic resumed.