Good link, did you notice the response of one of the posters there regarding various vehicle codes from the states:

"In point of fact, of the 44 states for which I
now have the relevant sections of their vehicle codes, just 21
are in substantial conformity with the UVC/CA exceptions to the
'Ride as far to the right as paracticable' rule. 23 states do NOT
contain this clause concerning lanes too narrow to safely share.

Of this latter group, 10 states just list "passing another vehicle"
as their sole exception to the 'Ride right' rule, Maine lists "making
a left turn" as its sole exception, and the 'winner' as far as I can
determine in the most restrictive vehicle code category is...
.
.
.
Alaska--which allows NO exceptions at all. And to add further
insult to injury, Alaska also requires that bicycles "shall give way
to the right as far as practicable to a motor vehicle proceeding
in the same direction when the driver of the motor vehicle gives
an audible signal"! So motorists are actually *encouraged* to
honk their horns at bicyclists to help 'persuade' them to get
out of their way.

Yikes!"

Of course this is refuted by another poster:

"My reading of that bit of the code is that on a multi-lane road, you
have to use the right hand lane. (no cruising in the center or left
without cause). It doesn't mean you never get to claim the lane.
Practible is not the same as possible, a distintion too many miss. If
a lane is too narrow to share, you can claim it. Its not "practial" to
invite getting sideswiped. Claiming the middle lane is a different
story, and in such states, it looks like it would be illegal..."

Now this does pose an interesting twist to the perceived issue of overtaking accidents... No doubt as many point out, this is the lowest percentage accident, but what about sideswiping or clipping accidents?

And just to add grist to the mill, this last poster also observes that drivers are regularly voluntarily breaking the laws... he notes this through casual observation:

"An unrelated observation: I kept track of basic traffic law compliance
on todays commute. In the 10km, I saw 4 cars run red lights, 7 exceed
the 20mph school zone speed limit by 10mph or more (the town has a FYI
radar display, and it happened to be placed there, which is what
started my tally). 3 failed to stop at a stop sign, (one was a 20'
truck). I saw 2 instances of failure to yeild for a pedestrian in
crosswalk (a fairly recent statue, with a $100 fine). I also saw 14
cyclists obey traffic signals, none disobey. One sidewalk cyclist (in
a biz district, so illegal). Suprisingly, no wrong way cyclists."

Now quite obviously there are some places were there are no "added provisions" for cyclists and one simply must "take the lane;" however, that those instances exist, should not encourage cyclists from advocating to their local governments that perhaps improvements could be made.