I live in northeast Columbus and have driven/ridden that segment at least once a week for more than 20 years. You come to expect especially during the rush hours, that drivers will merge right AND left from the 23 interchange to load up to the right for the 71 ramp, stage up for Cleveland Avenue in a middle lane or go completely left to stay on 270 east. At that point drivers are still working out their lane positions from the 315 ramp just prior to 23. Both 315 and 23 are active and stressful, so it cranks up drivers and makes them act less predictably. My daughter hates to drive that stretch and I don't blame her one bit. My approach is to be predictable and gradual and to anticipate that people will suddenly shift lanes at any point up until Cleveland Ave. It looks like you did the opposite and were making use of your maneuverability and acceleration to slip past slower movers. Unfortunately when you zigged right, out of a 270 east "passing" lane towards a row stacking up for 71, it was faster than the car on the right expected, who was avoiding the silver van ahead of her (it was slowing to make a right into the 71 south ramp lane). If you saw her signal prior to taking the lane, I bet you made the gamble that you'd either get past her before she completed the change, or that she'd see you and postpone her move and you'd be that much closer to the ramp's entry. You yourself probably didn't see the silver van situation developing, gambled wrong and she continued her lane change, probably never seeing you fill the void until you were past her fender. So who's right? Ultimately the heavier vehicle would win(!), but I'd say that although she could have been looking better all the way to the moment of the change, she was in the process of avoiding that silver van ahead of her and was moving to a previously clear lane to the left for safety. You filled that void, cutting off her "out" at the last minute and compressing an already tricky stretch.