O.P.P. say off-road vehicle deaths have reached a four-year high.
And, they're saying, the factors related to these deaths is prompting them to remind off-roaders to be careful ahead of the Victoria Day long weekend.
Police say there were 20 off-roader-related deaths in OPP jurisdictions in 2013, up from 12 in 2012. There were 14 deaths in 2011 and 17 in 2010.
Of the 20 deaths in 2013, 13 of them involved a rider with no helmet. Nine of them involved alcohol.
Police are also urging drivers to be on the lookout for motorcycles. They say in 11 of the 28 motorcycle-related deaths last year, another driver was considered to be at fault.
Motorcycle deaths in O.P.P. jurisdiction are on the rise. There were 28 fatalities in 2013, up from 26 in 2012 and 21 in 2011.
O.P.P. officers will be out in force over the long weekend, because of increased traffic volume, and they're asking motorists and off-road enthusiasts to do their part to make it an incident-free weekend.
May 13-19 is Canada Road Safety Week.