Other cyclists have proven much more dangerous than motorist. but the the right hook at an intersection is probably to one to look for the most. left crosses are rarer at intersections, look for those mid-block where motorist are going into driveways and parking lots. if someone does give you a left cross there's a good chance the traffic lane you're in is clear so go to your left as well if you don't stop. door openers and pull outs are a good reason to not hug the curb, you're easier to see if you're in the street.