The latest happened yesterday at about 9 p.m. near Mont-Saint-Hilaire.
Provincial police spokesperson Claude Denis said a man in his 50s crashed while heading eastbound on Highway 20.
“He lost control of his cars and crossed the other lane of Highway 20, but he did not hit any other car and finished in the field,” said Denis.
The man was pronounced dead in hospital.
Denis said the driver might have had a heart condition or some other health problem just before the accident.
Vehicle submerged in river
Police were called to an accident a few hours earlier in Saint-Alexis-des-Monts, about an hour west of Trois-Rivières.
Someone spotted a vehicle nearly submerged in the river. Police found a man in his 50s inside.
He was taken to hospital in critical condition and later pronounced dead in hospital.
Denis said speed and alcohol may be to blame.
On Saturday night, two men in their 20s died when the driver lost control of the vehicle near Preissac in the Abitibi region.
Police said speed may have been a factor.