Motorists who have already paid speeding tickets on intersection safety cameras in Edmonton will now get refunded dating back 15 months. The announcement from the province comes a little more than a week after the city and Edmonton police cancelled the distribution and prosecution of all outstanding 'Speed on Green' tickets.

"This is the right action to take," said Minister of Justice and Attorney General Alison Redford . "Our first concern is the fair administration of justice, and we cannot proceed with legal action when there is doubt about the accuracy of the city's Speed-on-Green ticket technology."

Edmonton police previously reported that out of 245,000 violations detected on the cameras last year, 26 could not be properly verified. Officials said while most violations were stopped at the quality control and screening stage, one was accidentally mailed out.

"You can't mail out one bad ticket. It's just not acceptable," said Bob Boutilier, GM of the city's transportation department.

Police wanted citizens to know that if they have a Speed on Green ticket in their possession, they should not pay it.

Tickets that combine an intersection speeding violation with a red light violation are also being cancelled. Police also wanted people to know the cancellation does not involve tickets issued for a red light infraction, or photo radar tickets taken outside of intersection areas. These tickets are still valid, and must be paid or dealt with in court.

The province says approximately 102,700 tickets were paid between the period of November 2009 and January 20, 2011.

Alberta Justice is working with the City of Edmonton to establish a process and timeline for the refund.

The refunds are expected to cost about $13 million. And three quarters of that will come from the city. Officials insist the money is there. The city typically takes in $7 to $9 million per year from drivers getting caught by cameras while speeding through green lights.

"My area of responsibility in the transportation department is to figure out a way to cover that loss," said Boutilier.

The province says cheques will be mailed out over the next three to four months. The city hopes 'Speed on Green' is back up and running in about a month. The city is working on the glitch that suspended the program and hopes to have it figured out in the coming weeks.

With files from Bill Fortier