I've been through court quite a few times now so this isn't super new to me... however, i cannot find any case law at all about signs not being visible due to sun set light.
Long story short - I made a U-turn at a controlled intersection with traffic lights (from the left turn lane). I was facing westbound prior to the left turn lane right before sunset. There was one no u-turn sign for the entire intersection and the sun happened to be right beside the sign (as it was setting).
Due to this setting sunlight glare, I could not see the sign.
from O/Reg 615
Because the road is straight with no curves, would the sign be considered not visible?
45. A sign prescribed by this Regulation, other than a sign prescribed by section 13, 14, 15, 24, 25, 26 or 27, shall be so placed as to be visible at all times for a distance of at least 60 metres to the traffic approaching the sign. O. Reg. 175/08, s. 15.
(also, i feel like the reason why backlit signs exist is for this reason)
Glare in what way? Glare bouncing off the sign? Glare in your eyes?
Signs are made not to glare up from bouncing light. If you can't see because of the glare in your eyes, the solution is to pull over and not continue driving blind.
Former Ontario Police Officer. Advice will become less relevant as the time goes by !