Originally Posted by
ThermionicScott
That's quaint, but the "left hand up for a right turn" signal needs to die already.
It has in Colorado. From
Colorado state law
Except as otherwise provided in this subsection (9), every person riding a bicycle or electrical assisted bicycle shall signal the intention to turn or stop in accordance with section 42-4-903; except that a person riding a bicycle or electrical assisted bicycle may signal a right turn with the right arm extended horizontally
You don't
have to use your right arm but you look goofy if you do
Originally Posted by
TransitBiker
Arrows in lanes at most intersections should take the mystery out of where i am going, though some drivers still think if i'm in a turn lane i'm going straight..

Left turns are made from left side of lane, and right turns do not cross anything, negating need for signaling in most cases.
- Andy
The problem is that many people move over into the turn lane...usually right...and then
do go straight.
Right arm/right turn is intuitive, most drivers will understand, if they are paying attention at all.
Left arm/right turn is an anachronism, fewer drivers will understand it each year.
Not only is the left arm/right turn signal anachronistic, if you really look at someone who does it, it throws them off when they corner. Their body position is all wrong and they go into the corner unbalanced.