THE introduction of hi-tech truck speed cameras on the South Eastern Freeway has been delayed.
The speed limit for trucks with five axles or more was dropped last May to 60km/h from the Crafers interchange on the down track.
A Transport Department spokeswoman said the cameras, that were to be installed in December, had been delayed as the technology never had been used in SA.
"The department is taking every step to ensure the proposed systems will operate effectively and the data has guaranteed accuracy," spokeswoman Alissa Smith said.
"The department is working with SA Police and legal officers to ensure all regulatory changes are made before the cameras become operational, it is not known yet whether any legislative change will be required through the Parliament."
Speeding truck drivers face double the penalty if caught speeding by both cameras.
The limit was cut after a departmental report showed there had been 135 crashes, two involving fatalities, in the 10 years to 2011.
The cause of most of the truck crashes between the Crafers Interchange and Conyngham St, were put down to brake failure.
A survey conducted by the department last year 100m inside the start of the new 60km/h speed zone found almost 450 heavy vehicles of the 900 using the road each day were speeding.
The Advertiser understands the cameras will have the capability to detect all speeding motorists but neither SA Police or the Transport Department would comment if the cameras in that capacity.