sproqitman said:The absolute flattest route would be to take River Road (exit 135) into Puyallup, then cross over the river on Meridian and pick up 167. But the second flattest route would be to take 512 (exit 127) over to 167. 512 has the benefit of that nice long downhill heading into Puyallup, and avoids the stoplights on River Road/Meridian. I'd take 512.DaveinOlyWA said:what is the "flattest" route to cross over from I-5 to 167?
I-5 to 512 is flat, down a hill into puyallup (still freeway) and 167 is probably the best path you can take. there's no up hill any part here.
River road would be a close second because there is a long stretch with only one light, at a speed limit of 45-50, which is more power optimal for the LEAF.
On your way to Auburn, if you are wanting to get some regen power coasting down a hill, take Highway 18 from I5 to Hwy 167
Any benefit would be negated by a considerable climb into federal way out of fife.