Chronic, long-standing maintenance problems and frequent breakdowns are said to be the main causes.
Senior citizens, workers and Kuala Selangor residents who do not have cars or motorbikes have no choice but to use the bus to get to Klang.
A stationmaster who did not want to be named said there anger was simmering among the passengers from Kuala Selangor, Klang and Banting including bus drivers over the failing bus service.
He added the drivers were struggling to maintain service under impossible circumstances.
“In 2012, we used to have at least eight buses from Klang to Kuala Selangor and 10 buses from Kuala Selangor to Klang. But now, only three buses ply Route 156 both ways. It is difficult,” said the stationmaster.
He added the buses that break down were just kept at the depot in Shah Alam and not repaired.
“Most buses spotted on the road are unfit, with one headlight working, poor brake control and no first aid kit aboard.