There was a stupid blonde (redundant?) driving her Jetta up the 347 @ about 4:45a, in the left lane with her cruise on about 64. completely oblivious to the other cars on the road.

Quite a few of them flashed their lights or honked their horns, to no avail.

I did enjoy a few of them almost taking off her front bumper as they squeezed in front of her.

There are two statutes regarding this topic: one requires you to move over to the right (when safe) if traveling less than the posted limit, and there are five or more vehicles behind you (also germane to two-lane highways); the other requires you to stay to the right if traveling less than the normal speed of traffic at that time and place.  The second is not widely enforced, because if the normal speed of traffic at that time is above the speed limit, then the officer has to tell the person to either break the law (speed) or move to the right.  The fact is that it is against the law to speed and the violence of the collision increases exponentially with the velocity; bad/inatentive driving increases your chance of being involved in a collision.  In Europe, they focus on reducing collisions rather than the severity of the collision.  Do with that what you will.

Sorry, I forgot - Failure to obey traffic control device - The problem with that one is its only posted once (I think) - North of the RED light.  Additionally, since 347 is not a controlled access highway (which I think it should be), people still have to use the left lane (referred to as the number one [#1] lane) to prepare for left turns.

I agree 100%, I now set my cc to 59 instead of 69 and there is a noticeable change in mileage.  Once I get past the RED light I set the cc crank up the tunes and roll!

When I dropped from cc set at 70mph to 58-60mph, my mileage went form 42/44 to 50/52mpg. 

I also am on the the 347 at 4:30am and 1pm.  So, I see very little traffic.

28-701. Reasonable and prudent speed; prima facie evidence; exceptions

A. A person shall not drive a vehicle on a highway at a speed greater than is reasonable and prudent under the circumstances, conditions and actual and potential hazards then existing. A person shall control the speed of a vehicle as necessary to avoid colliding with any object, person, vehicle or other conveyance on, entering or adjacent to the highway in compliance with legal requirements and the duty of all persons to exercise reasonable care for the protection of others.

B. Except as provided in subsections C and D of this section or except if a special hazard requires a lesser speed, any speed in excess of the following speeds is prima facie evidence that the speed is too great and therefore unreasonable:

1. Fifteen miles per hour approaching a school crossing.

2. Twenty-five miles per hour in a business or residential district.

3. Sixty-five miles per hour in other locations.

C. The speed limits prescribed in this section may be altered as authorized in sections 28-702 and 28-703.

D. The maximum speed provided in this section is reduced to the speed that is reasonable and prudent under the conditions and with regard to the actual and potential hazards then existing, including the following conditions:

1. Approaching and crossing an intersection or railroad crossing.

2. Approaching and going around a curve.

3. Approaching a hillcrest.

4. Traveling on a narrow or winding roadway.

5. A special hazard exists with respect to pedestrians or other traffic or by reason of weather or highway conditions.

E. A person shall not drive a motor vehicle at a speed that is less than the speed that is reasonable and prudent under existing conditions.

28-702.04.

 Maximum speed limit on interstate highways outside urbanized areas; definition

A. The speed limit for all types of motor vehicles is sixty-five miles per hour on the interstate system highways located outside of an urbanized area with a population of fifty thousand or more persons, except that the director may declare a lower speed limit on the highways pursuant to section 28-702.

B. A person shall not drive a motor vehicle at a speed in excess of the maximum speed limit prescribed by this section.

C. The director may order the increase of the maximum speed limit prescribed in subsection A of this section to seventy-five miles per hour on an individual interstate system highway subject to this section or on all of the interstate system highways in this state as prescribed in section 28-702.

D. A violation of this section is a civil traffic violation, and the person is subject to a civil penalty that does not exceed the amount provided by section 28-1598.

E. For the purposes of this section, "urbanized area" means an urbanized area as defined in the decennial census by the United States bureau of the census.

Slowing down saves gas. However, should you have the urge to pass, I say go for it.