THE O-Bahn busway has reopened after a young pedestrian was hit and killed by a bus this morning.

The man, 19, died near Paradise Interchange just after 6.30am.

Services between Paradise and Tea Tree Plaza were suspended following the tragedy.

The man's death comes less than 12 hours after a youth was also hit by a bus on the O-Bahn and taken to the Women's and Children's Hospital.

There are no further details about last night's incident and it is unknown whether the two are related.

Police are investigating the circumstances of the tragedy but say there is no indication the bus driver was in any way at fault.

Anyone experiencing personal problems should contact Lifeline on 13 11 14 or www.lifeline.org.au; or Beyond Blue on 1300 224 636 or www.beyondblue.org.au .

media_camera Transport workers inspect the bus involved in the O-Bahn tragedy this morning. Picture: Tait Schmaal

LONG WEEKEND WARNING TO MOTORISTS

Meanwhile, Traffic Support Branch officer-in-charge Superintendent Bob Fauser has urged all motorists and pedestrians to take care on the roads this Queen's Birthday long weekend.

South Australia has not had a fatality-free June long weekend since 2004 and Mr Fauser said people who planned to drink should avoid driving and the catastrophic consequences that could eventuate.

"We ask South Australian road users to make sure that they plan their trip and their night out so they are not tempted to drink and drive," he said.

"If they (people) consume a lot of alcohol overnight, a sleep may not result in them having a legal blood alcohol the next morning."

Supt Fauser said drink-drivers were less likely to wear a seatbelt - and he revealed 10 of the 12 drink-drivers killed in 2012 were not wearing a seatbelt.

Motor Accident Commission road safety general manager Sharon Hanlon said drink-driving was a lethal combination and often led to over-confidence and poor choices, including not wearing a seatbelt.

"Clearly alcohol is the most problematic of all the drugs in terms of road safety," she said.

"We know people can act impulsively and after a few drinks judgment is impaired. If you are going out to have a drink or two this long weekend, plan how you will get home before you leave home and don't take the car."

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