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The city started installing some cameras last year and it expects to have all the new cameras running by the fourth quarter of 2017.

Transportation services GM John Manconi explained the location rationale in a memo to council.

The city’s traffic gurus looked at crash statistics over three to four years to decide on the new camera locations. They looked for intersections with an average of three or more angle collisions annually because of red-light running, and five or more angle collisions because of red-light running in one direction over the entire period.

The city knows the cameras can increase rear-end collisions, but it’s focus is on preventing the more severe angle collisions, such as T-bone crashes.

According to Manconi’s memo, “site selection is based on the occurrence of collisions that could be prevented by reducing the incidence of red light running at a signalized intersection.”

Adding more red-light cameras was part of Mayor Jim Watson’s re-election campaign in 2014.

The City of Ottawa is budgeting $800,000 more in revenue from red-light cameras in 2017.

The fine for running a red light is $260, plus a $5 service fee and $60 victim surcharge.

jwilling@postmedia.com

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