I'm also sorry to say that this is just part of using a two wheeler on the road. Any biker will tell you tales of SMIDSY accidents where a car driver has driven into or over them and then said Sorry Mate I Didn't See You!
I've suffered a SMIDSY some years ago while wearing council issue maximum conspicuity clothing while riding in a queue of cars, and the driver still claimed not to have seen me!
If you are reasonably close to a river/canal I think NR's kayak suggestion needs looking into as a BOV. Inconspicuous, quiet and unaffected by fuel prices!
H