I want "I am unwilling to make u-turns." They are illegal by default in the city of Chicago, but if you miss a turn, Google will try to get you to make a dangerous and illegal u-turn. If you ignore that, it'll suggest you another one further down the road. No thanks, I'm not turning around on Michigan Ave at rush hour.
I've looked into this. Apparently you set turn restrictions per-intersection in the maps data editor. No one has the patience to go check "u-turn not permitted" on all the Chicago intersections that don't have it currently, so we're stuck without major architectural changes from Google.
"Avoid u-turns" should be next to "avoid highways."
I'd actually rather have the device tell me to turn around at a convenient place. Finding a place to safely go the other direction is part of learning how to drive and the exam anyway, and how to do that is at the discretion of the driver. Could be a U-turn, could be a roundabout, could just be going into a side road and using a drive way. But as you note, the map data rarely has the information where is possible or allowed.
I've looked into this. Apparently you set turn restrictions per-intersection in the maps data editor. No one has the patience to go check "u-turn not permitted" on all the Chicago intersections that don't have it currently, so we're stuck without major architectural changes from Google.
"Avoid u-turns" should be next to "avoid highways."