Ontario's coroner will be reviewing the number of cyclist deaths on the province's roads, a number that's growing as the number of bikers increases.

Andrew McCallum said he will be examining from 2006 to 2010 to try to learn more about why around 15 to 20 cyclists die each year.

Samantha McGavin organized the tribute ride for Danielle Nacu, who was killed earlier this month while cycling in downtown Ottawa.

She said she's pleased with the investigation.

"It's a wonderful idea. I'm so glad this is being investigated," she said. "How can we design cities so that they lead to better and safer interactions on the road, and also how can we get more drivers off the road if possible onto bikes themselves or onto busses?"

In Ottawa, there were almost the same number of collisions in 2009 and 2010, although the number of fatalities drastically increased in 2010.

"We're looking to alert the motorists and cyclists to be very safe as they have to share the roadway," said Henri Lanctot with the Ottawa police. "Public safety is foremost the most important thing on everybody's mind."

The cycling report should be ready for spring 2012, just before Ottawa's newest segregated bike lane on Wellington Street is scheduled to open in June.

Construction will begin Tuesday on the lane that will run from Bay Street to the Portage Bridge, with the right lane closed from 9:00 a.m. to 3:30 p.m. daily.

With a report from CTV Ottawa's Norman Fetterley