Hello everyone,
after a period where I have been a passenger of friends and colleagues ( due to surgery   ) I decided to write down what, in my opinion, can be insights to further improve this navigation system.

As a first suggestion ( I copy the idea from AmiGo ) is to make the indication of the speed limit and current speed more intuitive and readable by using colors inside the speedometer. The idea of verbally indicating the speed of speed cameras can also be very helpful.

The second point I would like to suggest ( this time the idea comes from Apple Map ) is to display traffic lights on the map and use their location to give more detailed voice directions.

The latest idea ( I don't remember the name of the application ) is to use the phone's camera ( if the phone is properly positioned ) with the ADAS and TSR algorithm to automatically update the map likes speed limits, closed roads, etc. 
To be honest, this last function was communicated but I never saw it in operation.