Maybe put his under the gamification of driving. What are your thoughts choosing a route based on elevation change and slope? I watched a Top Gear episode a few years ago where they debated what was best for fuel efficiency - flat or 'what goes up must come down'. I found a website, https://www.flattestroute.com/, that maps a trip and has elevation and slope but you have to do some calcs to get totals.
My guess is that it is a wash due to commutative law [minus system efficiencies] but wonder if anyone played around with this as part of driving strategies. I have a trip in a few weeks over the continental divide and choosing a route.
If you are talking about planning a long trip, I would just choose the shortest drive time or the route you prefer for scenic value. I would guess that routing around higher elevations would add distance that would offset the efficiency gains.
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