Thika Road accident outbound was caused when about four buses crashed into each other heading away from town.
The accident which occurred around 7am during early morning rain, caused traffic snarl up along the stretch.
Motorists were forced to use the service lane in order to survive the time.
The Muthaiga stretch along Thika Road looks like another black spot that even has a wreckage of crashed hanged car to warn speeding drivers.