Calgary police mailed out 388,458 tickets to drivers caught on camera speeding or running red lights last year.

That's 1,064 tickets per day.

It's also an increase of 20.7 per cent over 2014, which is mainly the result of a surge in speeders caught by mobile photo-radar units.

Infractions caught by fixed cameras — the ones installed at intersections — were actually down last year, with speed-on-green tickets dropping 16.6 per cent and tickets for running red lights down 4.7 per cent.

Tickets issued by mobile photo radar vehicles, meanwhile, surged 46.7 per cent to 273,082 total infractions.

Insp. Ken Thrower with the Calgary police traffic unit said there were several factors that might contribute to the increases, including good weather and the addition of four more photo radar vehicles, bringing the total number of the fleet to 10.

Thrower also said police refocused on residential enforcement last year at the request of communities.

This interactive graph shows tickets by type for the past three years. Click on a year to see the numbers change:

Here's how the tickets break down, by type of offence and how drivers were caught:

Offence Type 2013 2014 2015 Change ('14-'15) Photo Radar - Basic speeding 79,390 110,886 191,883 + 73.0% Photo Radar - Construction zone 9,297 7,585 3,621 - 52.3% Photo Radar - Construction zone with workers present 1,759 352 1,306 + 271% Photo Radar - Exceeding time-of-day limit (eg: playground zone) 64,708 67,321 76,272 + 13.3% TOTAL Photo Radar 155,154 186,144 273,082 + 46.7% TOTAL Speed on Green 105,500 116,390 97,054 - 16.6% TOTAL Red light 16,321 19,227 18,322 - 4.7% TOTAL Infractions 276,975 321,761 388,458 +20.7%

Last year a total of $21.1 million in fine revenue was collected from photo-radar tickets, another $10 million from speed-on-green tickets, plus $3.6 million from drivers caught on camera running red lights.

Tickets handed out the old-fashioned way — by officers pulling drivers over and ticketing them in person — yielded another $15 million in fine revenue, police said.