These would be good options, but to make it intuitive and not overly complex you probably need to group it into a few major use-cases. I recently rented a car a

These would be good options, but to make it intuitive and not overly complex you probably need to group it into a few major use-cases. I recently rented a car and the built-in nav offered 4 route options that I'm pretty sure (tough to interpret some of the icons) broke down into: optimize for time, optimize for fuel, optimize for distance (don't know when I would choose this one - I would think trying to minimize wear on the car would be better when optimizing for fuel), optimize for turns. I think that last one could be improved for the towing use case you mentioned - I would often trade several minutes to make 3 right turns to avoid a left, but for the most part I'd also just like to get to some road and then not worry about any lane changes for a while. Maybe "fewest turns" and "fewest left turns" should be separate options. There's also a "no tolls" option on every nav system I've used, but I wish you could configure the trade-off there too- there's a dollar amount I'm willing to pay for every 10 minutes it saves me, depending on the day.