I've used navmans with success. In Auckland its all about knowing alternate routes and times that the traffic starts to build up and weather you are going towards the CBD our way from it at these times.
3rd pic is Hydrocotyle leucocephala
4th is probably Wendtii green@ the front and undulata at the back
5th is star grass
7 is star grass,Hygrophila polysperma and what might be Rotala indica