TORONTO - The latest study by a group representing Ontario doctors shows chatting on a cellphone while driving significantly increases the risk of collision.

The Ontario Medical Association says mobile phone use impacts a driver's cognitive function, visual concentration, speed of processing information and reaction time.

The study has found that cellphone use puts drivers at significantly greater risk of collision, regardless of whether they use a hands-free or hand-held phone.

"There certainly have been figures that show that people have used their cellphones in a time frame before their accidents, there have been studies that show when cellphones are banned that accident rates decrease," said Dr. Ken Arnold, president of the association.

The group is urging the provincial government to take note of the research, Arnold said.

The association wants to see mobile phone use in vehicles -- including texting and emailing -- curbed, and more educational programs created.

"Whether they have a publicity program or whether they go the legislative route and enact laws, that would be their decision," Arnold said.

According to the study, cellphone use while driving is banned in three provinces and more than 30 countries.

Among the study's most surprising findings is that cellphone driving can pose nearly the same risks as driving at the legal limit for alcohol.

"Certainly we've recognized long ago the dangers of alcohol and driving, so I think it's time to look at the risks that cellphone brings to our driving," Arnold said.