Hi, Thanks and oh, I love your sig :p
Well, I do'nt really remind how works camera at "La source" and can't get figure what you really want.
If goal is to make camera stop moving at a given point, I don't know how to do that. If you want next camera being "activated" later, just increase "next camera" value of "La source" camera.
Raising kerbs have nothing to do with cc-line. You have to edit the kerbs commands in the bus stop track sectors. Kerbs command is fully described in the guide and in 3DEditor with a picture.
Good luck in your attempt and if you can precise your wish for first camera, I will try to answer you more precisely if I can.