It is if there is only one lane and it can not be done safely... Passing to right of vehicle 150. (1) The driver of a motor vehicle may overtake and pass to the right of another vehicle only where the movement can be made in safety and, (a) the vehicle overtaken is making or about to make a left turn or its driver has signalled his or her intention to make a left turn; (b) is made on a highway with unobstructed pavement of sufficient width for two or more lines of vehicles in each direction; or (c) is made on a highway designated for the use of one-way traffic only. And maybe these would apply as well to show that passing on the right is not allowed: Vehicles or equestrians overtaking others 148 (5) Every person in charge of a vehicle or on horseback on a highway who is overtaking another vehicle or equestrian shall turn out to the left so far as may be necessary to avoid a collision with the vehicle or equestrian overtaken, and the person overtaken is not required to leave more than one-half of the roadway free. Passing vehicle going in same direction 148 (8) No person in charge of a vehicle shall pass or attempt to pass another vehicle going in the same direction on a highway unless the roadway, (a) in front of and to the left of the vehicle to be passed is safely free from approaching traffic; and (b) to the left of the vehicle passing or attempting to pass is safely free from overtaking traffic. So section 148(5) and 148(8) says you can only pass on the left and section 150(1)(a) says you can only pass on the right if it is safe to do so AND the other vehicle is signalling a LEFT hand turn. In this case the op was signalling a right hand turn and therefore the other vehicle (bike) was not supposed to be passing on the right and there was no reasonable expectation to look for something that should not be there.
It is if there is only one lane and it can not be done safely...
Passing to right of vehicle
150. (1) The driver of a motor vehicle may overtake and pass to the right of another vehicle only where the movement can be made in safety and,
(a) the vehicle overtaken is making or about to make a left turn or its driver has signalled his or her intention to make a left turn;
(b) is made on a highway with unobstructed pavement of sufficient width for two or more lines of vehicles in each direction; or
(c) is made on a highway designated for the use of one-way traffic only.
And maybe these would apply as well to show that passing on the right is not allowed:
Vehicles or equestrians overtaking others
148 (5) Every person in charge of a vehicle or on horseback on a highway who is overtaking another vehicle or equestrian shall turn out to the left so far as may be necessary to avoid a collision with the vehicle or equestrian overtaken, and the person overtaken is not required to leave more than one-half of the roadway free.
Passing vehicle going in same direction
148 (8) No person in charge of a vehicle shall pass or attempt to pass another vehicle going in the same direction on a highway unless the roadway,
(a) in front of and to the left of the vehicle to be passed is safely free from approaching traffic; and
(b) to the left of the vehicle passing or attempting to pass is safely free from overtaking traffic.
So section 148(5) and 148(8) says you can only pass on the left and section 150(1)(a) says you can only pass on the right if it is safe to do so AND the other vehicle is signalling a LEFT hand turn.
In this case the op was signalling a right hand turn and therefore the other vehicle (bike) was not supposed to be passing on the right and there was no reasonable expectation to look for something that should not be there.