Rolling hills with no stops are the best for mileage. I'm convinced they're better than flat terrain. It's good as long as they meet these conditions:
- reasonable speeds
- traffic allows you freedom to vary your speed (slow at the top)
- no stops at the bottom (at the top isn't too bad)
- not too steep (up requiring a downshift, down requiring brakes to prevent overspeed)
My commute mostly meets these conditions. There are a couple poorly-positioned lights, but by approaching slowly I can usually hit the green. 45-55 speed limits are ideal.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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