Lane splitting, sharing, filtering is now legally on the books in California.
Prior to the new law it was posted as allowable on the CHP website only.
Splitting, Sharing and Filtering are all different in so themselves. If no blinker is used while splitting in Cali, officers have been known to ticket for failure to signal.
Lane sharing doesn’t require a signal as no lane has been changed. Filtering usually has speeds noted.
And the lanes for allowable sharing may be posted in guidelines to further promote safety for both cars and motos.
I don't view it in that way. Lane sharing has always been legal because there was no proscriptive law that said it wasn't legal and there were no proscriptive laws that defined how, when, and where it could be done. This is why I use the analogy with growing petunias. There's no law that says you can't, so go ahead. Growing pot plants is another matter. There are laws that define where, how, and when you can grow pot.
Having something that is on the CHP's website has no legal force. The majority of laws are proscriptive; they tell us what we cannot do. The CHP, I believe, put up on their website that (along with some guidelines) lane sharing was legal in response to some concerns that were voiced from the general public and some of our more cross-eyed and drooling legislators.
AB51 did not change that, nor did it 'legalize' lane sharing. Logically, it could not do that because lane-sharing was already legal.
What AB51 did was define what lane-sharing (VC 21658.1 uses the term "lane-spitting") was and it weakly said that the CHP may develop educational guidelines. This was a concern that I had with AB51; the CHP may develop guidelines
... We may not like those guidelines. It hasn't come to pass; let's knock on wood. The guidelines that the CHP did briefly publish received a lot of press and educated a lot of people and was a very good thing. I hope the CHP's position remains in place in perpetuity! I split lanes regularly on the 405 and usually encounter drivers who leave room and many who actively move to the left to make more room. I've found that to be true along the entire length of the 405.
Another concern I had with AB51 was that, once lane-sharing was defined, it opened the door for legislation down the road along the lines of "Lane sharing, as defined by VC 21658.1, is only permitted under the following conditions...". We have to remember that our legislators do not drive and are the same idjits that have a speed limit for cars of 70mph on the interstates while trucks are moving are limited to 55, in spite of the fact that it has long been accepted that one significant contributor to motor vehicle safety is to have all traffic moving at the same speed. In the real world, this leads to s 20-25mph difference in speed between trucks and cars.
I trust these legislators about as far as I can pick them up by their ass and throw them. The less they put into code, the better. Re AB51, I wish they had left well enough alone.