I'm a pretty big fan of Ontario's parclo design (http://en.wikipedia.org/wiki/Parclo).

The most standard design (called A4 in the wikipedia article) has the same amount of traffic lights as this design. There is no driving on the left, no weaving, and there are no left turns with oncoming traffic.

Access onto the highway is a right turn for all directions. Access from the highway is light-controlled right or left turn. The highway has more capacity than the intersecting road, so while dumping traffic from the road onto the highway at a maximum rate using the easy right turns is fine, the light at the exit off the highway serves as rate limiter if necessary so that the road is not overwhelmed with traffic.