THE Government will double the number of fixed traffic cameras in Adelaide with an additional 10 cameras to be installed on main roads near schools.

Site work has begun and new cameras will be rolled out firstly at pedestrian crossings near the Goodwood Primary School, Seaview High School and Darlington Primary School, at Darlington, and Linden Park Primary School, east of the city.

Other fixed cameras are planned to be built on Main North Rd, near Nailsworth Primary School, also near Warradale Primary School, Diagonal Rd, St Agnes Primary School, Hancock Rd, St Agnes, Hamilton Secondary College, Marion Rd, Marion, Antonio Catholic School, Bains Rd, Morphett Vale, Immanuel Lutheran School, Lyndoch Rd, Gawler, and at Norwood Morialta High School, St Bernard's Rd, Rostrevor, over the next two years.

The new fixed commitment will take the number of fixed red-light cameras to 20 within the next two years.

The 2013/14 State Budget included ten red light and speed safety cameras to be installed on roads adjacent to school sites.

Transport Department data shows that 6932 motorists were snapped by existing fixed cameras speeding or running red lights at pedestrian crossings in the past six months.

Department footage shows trucks and cars hurtling thought red lights while school students wait to cross.

"There are some who are just plain careless drivers and they are prepared to take those sorts or risks,'' Police Traffic Support Branch Superintendent Bob Fauser said.

Fines for speeding through red lights can be more than $1000 and attract nine demerit points.

Since 2004, two cameras have operated on Portrush Rd, outside Loreto College and Mary MacKillop College.

Fixed cameras are also operational on South Rd, Black Forest (Black Forest Primary School),

Portrush Rd, Trinity Gardens (Trinity Gardens Primary School), Regency Rd, Kilkenny (Challa Gardens Primary School) and on Phillip Highway, Elizabeth (Fremont-Elizabeth City High School).