Because people still think they're somehow going to arrive 30min faster by not merging one-by-one, ignoring the fact that by not letting others in they're actively slowing all other traffic down. Then have all other nervous drivers looking for the first opportunity to cut someone off because they're not going to be able to merge otherwise and you end up with all those crashes near the ends of merge lanes. It's a driving culture issue, varies by country.
Because people still think they're somehow going to arrive 30min faster by not merging one-by-one, ignoring the fact that by not letting others in they're actively slowing all other traffic down. Then have all other nervous drivers looking for the first opportunity to cut someone off because they're not going to be able to merge otherwise and you end up with all those crashes near the ends of merge lanes. It's a driving culture issue, varies by country.