Halifax has the highest collision frequency rate (7.9%) in Canada this year, according to the Allstate Insurance Company of Canada’s 2017 Safe Driving Study. It’s the third consecutive year that Halifax has topped Allstate’s study of collision frequency in Canada. Ajax, Ont. (7.77%) and North York, Ont. (7.67%) rounded out the top three communities with the highest collision frequency rate per 100 cars between 2015-2017. On the opposite end of the spectrum, Hanmer, Ont.