implemented by Oromia Regional State Transport Bureau.
Interrupted time series design is an alternative approach
u s e d t o e v a l u a t e t h e e f f e c t s o f a n y i n t e r v e n t io n , w h e n
r a n d o m i z e d c o n t r o l t r ia l s a r e i n f e a s i b le o r i d e n t i f i c a t i o n
o f a c o n t r o l g r o u p i m p r a c t i c a l [ 1 1 ]