Better Unit Configuration Options
Kind of a combination of several previous ideas but...
I'd like to see the distance units options split in two: with "km", "Mile", and "Local" on the first slider; and "Ft", "Yd", and "m" on the second.
The first slider would continue to control which units were used for long distance directions, speed limits, ect. However, the local option would switch automatically switch between "Mile" and "km" depending on where you were. For example, if your in the UK, the "Local" option would put the display in miles. However, if you then crossed the channel to Europe, it would automatically switch to Km.
The second slider would control the units used for instructions (visual and spoken) near a junction. This is important because many people (in countries like the UK) have never used Feet or Yards, with the meter being the unit of choice. But equally, using the Km on waze in a country that puts its signs in Miles is quite unhelpful.