14 Photos - Aug 5, 2012
Photo: (Pic1) Two through lanes with edgeline painted all the way to intersection; and very wide shoulder to the right of edgeline (NOT a right-turn-only lane).
Where may a bicyclist ride (when going straight ahead) in order to not be in violation of 28-815A?

Also where must the driver of a vehicle (that is, either a motorist, or a bicyclist) ride/drive in order to be in compliane with 29-751?
  28-751. Required position and method of turning. The driver of a vehicle intending to turn shall do so as follows: 1. Right turns. Both the approach for a right turn and a right turn shall be made as close as practicable to the right-hand curb or edge of the roadway...Photo: Knox Rd, Phoenix.
(Pic2) Edgeline bulbs out from curb. The additional diagonal white lines were added later.
What about 28-751 (required method of turning right)?Photo: Knox Rd, Phoenix.
(Pic3) Let there be no doubt: this is a bike lane.Photo: Knox Rd, Phoenix
(Pic4) where may a bicyclist ride in order to comply with 28-815A, as far right as practicable? Note that this is a designated Bike lane (between the two white stripes).Photo: Pecos Road, Phoenix
(Pic5) Two through lanes with edgeline. Note shoulder is quite wide and very smooth, good condition. There is no curb.Photo: Knox Road, Phoenix
(Pic6) This is pretty much same as Pic4 -- note that for the sake of argument  no parking is permitted -- so region 3 next to the curb is not a "parking lane". NOTE that region 2 is a *designated* Bike Lane.Photo: Chandler Blvd, Phoenix.
(Pic7) Signed Bike Route with small shoulder. This is a very popular configuration in the City of Phoenix -- the through lane is narrow (~ 10 feet) coupled with a 2.5' shoulder.

 This shot was taken in 2003. Chandler Blvd, westbound, section between 24th Street and Desert Foothills Parkway, Phoenix, AZPhoto: (Pic8) Narrow lane with edgeline and shoulder.
Route 66 near the intersection of Switzer Canyon Road, Flagstaff, AZ.Photo: 48th Street, Phoenix; just north of Frye Rd.Photo: Wakial Loop in Phoenix. The stripe was added years ago; I imagine in an attempt to slow through traffic. The road serves as a cut-through for AM rush hour traffic between 48th ST and Warner Rd.Photo: Though it ought to be self-evident; there is no bike lane here (the hash stripes should be a give-away)... Warner Rd eastbound at 51st St, Phoenix. The shoulder ends just around the bend approaching I-10.Photo: Remember, not all roads have shoulders, and not all roads with shoulders have paved shoulders. This two-lane highway has a wide, graded, dirt/gravel shoulder. Maricopa Road; near the Wild Horse Pass Casino.Photo: Knox Rd east of Rural.
This is a designated bike lane.
Most streets with sidewalks have a curb and the sidewalk is raised a few inches. 
This collector street has sidewalks but they're flush with the roadway, and there's no curb, just a kind of flat gutter pan.
One imagines curbs are often necessary to direct stormwater drainage.Photo: Knox Rd, west of Rural, Tempe. Fairly common collector street configuration. The road is laned, in this case, just with a center line. This road is a "two-lane highway". The lanes are quite wide, perhaps 18 feet, each; however parking is allowed.
The darker car is parked (not particularly well).
When no cars are parked, and no other obstructions, each lane is "wide enough to share" safely, and so bicyclists going slower than the "normal speed of traffic" must ride "as close as practicable" to the right-hand curb.
On the other hand, any parked vehicle narrows the lane to the point where it is clearly not wide enough to share; and 815A4 exception would apply and cyclists can ride anywhere within the right-half of the roadway.