I think there's a few concepts the city designers need to take into account when designing intersections of major arterial road in the city.

1. Look into adding right turn lanes at more intersections.

2. The intersections, when possible, should be completely square. That is, the lanes should line up and be parallel with another and perfectly orthogonal to the other road lanes.

3. To take the second point even further, turning lanes (especially double turn lanes) should line up with turning lanes across the street. All too often on 13th Ave, at many of the intersections you're trying to avoid the car in the turning lane next to you and basically avoid clipping the cars of the oncoming turning lanes opposite of you. If these were realigned to allow more turning room, traffic would flow smoother.

4. Have medians and left turn lanes set back, so they are not at the same stopping mark as regular lanes. This is pretty evident when turning left from westbound 13th onto southbound 45th, or north bound 45th onto westbound 13th, it takes a bit of skill to avoid hitting the concrete medians with your tires. It's also really when making left turns from southbound 42nd to eastbound 13th (by Target). Set the medians and turning lanes back and that will open the roadway up for left turns.

5. All inner lane medians should have a curve to them to all allow easier turns for vehicles making lefthand turns.

6. In terms of single turning lanes. The median splitter is in the wrong place... When attempting to turn into the HoHut Grill/Qdoba's strip mall from northbound 45th, you can't really see beyond the other vehicle opposite of you, because they are so far over to the left. While still maintaining dividers, if you actually placed the turning lanes closer to the opposite direction traffic lanes, they'd have a much easier time of seeing oncoming traffic and you'd still be able to have a divider in the roadway.