As someone who has driven large trucks in the past, you couldn't pay me enough money to be on a bike to the right of a truck if there is ANY doubt as to whether he's turning or not, and even if I'm really pretty sure, I'm watching his turn signals and his front wheel as though I'm a rabbit in the pen with a tiger. The slightest move to the right and I'll be up the curb and on the grass before you can blink.