A FORUM held to discuss Adelaide's troubled bus services raised many questions from disgruntled commuters but offered no answers.

More than 150 commuters gathered at a church in Hope Valley to discuss the state of the transport system, following information revealed in Parliament last week that showed services in some areas of Adelaide are so bad that every second bus is late.

One commuter labelled the system "a shambles" while another woman said that "you can't use a timetable to plan your journey ... and drivers are erratic."

One man asked where the suburb 'Not In Service' actually was.

Those who attended the forum were given forms to record their complaints and representatives from bus operator Transfield Services were present.

"We've heard you loud and clear," Transfield Services general manager Adam Machon said.

Transport Services Minister Chloe Fox was absent, with one media outlet reporting she had a prior commitment. It was also suggested she was not invited to attend.



Labor Minister and local member Tom Kenyon was there but did not speak as he passed the microphone around to audience members.



This morning on radio Mr Kenyon said questions raised at last night's forum would be passed on to Ms Fox.



"What this is about is my constituents being able to voice their concerns and last night they spent an hour talking to the bus company telling them their frustrations with the service," Mr Kenyon said.



"Everyone knows that they're out there ... we've taken all of their details down, each one had a form, they filled out all their concerns, we've collected those forms, we've sent them into the Department, into Chloe."



Opposition Transport Spokeswoman Vickie Chapman attended but was only let in provided she did not talk or interrupt people.



"I've never actually had a request from a local member at a public meeting anywhere in the state to say 'well you're allowed to come in but you're not allowed to speak'," Ms Chapman said.



"I hadn't gone there intending to speak, I'd actually gone there to listen and hopefully hear some answers. The Head of the Department was there last night, sat in silence, wasn't even advised to the meeting that he was there to answer any questions."

Minister Fox was invited by The Advertiser today to take part in a live chat this week to create an open forum on the state's services.