Wanted: Better Efficient Route Metrics

Google Maps has an obsession with putting me on highways and having me do crazy manouvers such as having me cross 3 lanes in less than 500 feet or make an uncontrolled left across 2 lanes of traffic on a 55 MPH road. All in the name of average speed. Is there navigation software that uses route metrics that are better at giving you a reliable ride and keeping you safe?

I think something like a 10th-percentile speed metric would be cool. Like, a highway can go fast, above 60 MPH, but also has a decent chance of going very slow during rush hour. A back road is more likely to give you a predictable speed, even if it's closer to 30 or 35 MPH.

Or maybe something that factors in life expectancy. Like, if your route includes some manouver that's fast, but is expected to kill anyone who takes it once out of 10,000 times, and you expect to live another 30 years, that manouver should count as costing 1,578 minutes, or an entire day. (Of course, that would mean that old people who can no longer drive well will be asked to drive even crazier than they already do, so that might backfire...)

Or maybe something else, I dunno.