Urban freeway speed limits

[kphoger]

usually, though, I try to hit the freeway already going at the speed of traffic.  if this involves a bit of revving, I don't mind it as much as kphoger does.  it's a very short acceleration and in the grand scheme of a full tank of gas, it's negligible.  If I'm merging onto the freeway more than 15-20 times during a tank of gas, I'm probably doing other things which are significantly more wasteful, like sitting in surface-level traffic.

Yeah, of my 11-mile one-way daily commute, 10 miles are freeway.  Accelerating from stoplights on short errands and freeway on-ramp entranaces, therfore, have a noticeable effect on my highway mileage.