You know where he will be, you know approximately when he will be there, all you need now is a sniper rifle and a vantage point.

Seriously tho, let's face it, it's extremely unlikely you will change his opinion therefore it's even less likely you will change his behaviour.... Start reporting him to the police, maybe even mount a camcorder on your bike and get evidence - a picture tells a story far better than words. Organise to ride with someone else and get a witness. Keep reporting every encounter to the cops.