I very rarely have to brake for anyone in lane 1 because I am usually able to join lane 2 when I see cars on a slip road because I am way ahead observing what is in lane 2 before I even see the slip road.
If I can't join lane 2, I drop speed to allow them to merge easily so I never have to brake.
If I can't join lane 2, I drop speed to allow them to merge easily so I never have to brake.