[markcerqueira]

I always thought this was "basic driving" knowledge that some people just don't get. Is the solution really to add more markings and signs to the street? Do you need "Left lane is for passing" along hundreds of miles of a highway in California?

[astrange]

Btw, California doesn't use the left lane for passing; you just have to yield to anyone going faster than you.

[godelski]

Most states have keep right laws[1]. Some are definitely stronger than others, but these laws aren't enforced as frequently, though I wish they were.

[1] http://www.mit.edu/%7Ejfc/right.html

tldr: If someone behind you is going faster and you are in the left lane, move right.

[user5994461]

Since you appear to be californian, do the bicycle lanes over there have solid lines or dotted lines?

[Stratoscope]

Solid lines until you get near an intersection, where they usually change to dotted lines to give a hint that you are required to merge into the bike lane before turning.

[rconti]

this, all over the bay area and from what i remember of socal.

[rconti]

apparently they do!