Lane Filtering OKed For Utah - Page 2 - Kawasaki KLR 650 Forum
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post #11 of 44 Old 04-05-2019, 06:21 AM
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There really hasn't been a lot of study on this topic, at least in the formal sense, here in the US. There was a recent study by UC Berkely but I can't find the study itself; it seems to have disappeared. This is not surprising given the abnormal proclivities of the folks up at Berserkely.

There are studies in the EU where lane sharing is already common practice but one wonders how transferrable those studies are to the US environment. In Europe lane sharing is part of the culture. A couple of the most wondrous sights I have seen were watching a large traffic circle in Rome and the circle around the Arc de Triomphe in Paris. Both were, what, 50 meters wide? Seems so. Within these circles, there are no lanes. 1% of the drivers are asshats who drive like Americans and the other 99% give and take as necessary to flow in and out of the traffic. It all works smoothly. Nobody honks, nobody beats on their steering wheel, nobody flips anybody off, and it isn't all horrible and depressing. They just navigate.

https://www.youtube.com/watch?v=65e4X7fYnk0

Here in California lane splitting has been going on for a long time and drivers are used to it. In the rest of the states I wonder what the reaction would be and how long it would take for drivers to be accustomed to it. Considering that many Americans can't name 5 members of the government, including the POTUS and VPOTUS, and couldn't find their own state on a map how do they get educated on something that is going to affect them on a daily basis?
Riding in Europe is much more fun than in the US, particularly in the Alps and in Italy. Motorcycles are respected there and almost anything goes as long as you aren’t reckless. Although, what they accept as normal there would be considered reckless by many in the states. I have quite enjoyed my road trips in Europe.
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post #12 of 44 Old 04-05-2019, 12:07 PM
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We don’t lane split in California, we lane share. This new Utah law simply allows bikes to share lanes at traffic lights while moving forward towards the front for safety. There are many studies proving this to be highly effective for Motorcycle safety.
No lawyer, I, but . . . I think the Utah law allows lane filtering through ANY stopped traffic at 15 mph or less, on roadway with a 45 mph or lower speed limit. Not JUST for traffic lights.

"Lane sharing" may be a more accurate nomenclature of the successful and effective California practice than, "lane splitting." However, the word-on-the-street was, California's practice BEGAN by allowing police motorcycles to filter to the front of a stopped line of traffic at a signal; those air-cooled motorcycles of the day didn't like idling in the back of the line. (Perhaps only legend and rumor; I repeat only what I've been told.)

Under the new law, UHP states:

Motorcyclists can move to the front of a traffic light on roads where the speed limit is 45 mph or less and has two or more adjacent traffic lanes in the same direction of travel.
Motorcyclists can only move to the front when vehicles are stopped.
Motorcyclists can’t move more than 15 mph when filtering lanes.

Bikes don’t overheat in California temps while stopped in traffic.
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post #13 of 44 Old 04-05-2019, 12:09 PM
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We don’t lane split in California, we lane share. This new Utah law simply allows bikes to share lanes at traffic lights while moving forward towards the front for safety. There are many studies proving this to be highly effective for Motorcycle safety.
Please provide a reference to one or more of these studies. I have not seen one that really addresses this.
Consider the Cal Berkeley study. There are many out there.
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post #14 of 44 Old 04-05-2019, 12:11 PM
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There really hasn't been a lot of study on this topic, at least in the formal sense, here in the US. There was a recent study by UC Berkely but I can't find the study itself; it seems to have disappeared. This is not surprising given the abnormal proclivities of the folks up at Berserkely.
The Cal Berkeley study is easily found online. There are many other studies.
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post #15 of 44 Old 04-05-2019, 12:16 PM
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Lane sharing is OK in California because, like growing petunias, it is not prohibited. Simply said, there is nothing in the vehicle code that prohibits lane sharing. Two cars (Lotus Super 7s, perhaps) could legally drive side-by-side on a California road. There is nothing in the CVC that addresses lane sharing by motorcycles or any other vehicle. There are no stipulations on how, when, and where lane splitting may be done; all of that is covered by more general CVC sections such as those dealing with safe driving practices.
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.
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post #16 of 44 Old 04-05-2019, 12:23 PM
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There are quite a few references to the study with descriptions/summaries of the study, but the links to the study itself are broken. At the Berserkley site the study is not listed under their publications. It's been MIA for some time, too. I recall looking for it when AB51 was late in its cycle and not being able to find the study document.

I'm not aware of any other studies conducted by impartial (well, let's say by entities not directly associated with motorcycling. ;^)) entities. UMich does a lot of stuff with lighting and has done plenty on motorcycle lighting, but nothing on sharing/splitting/filtering. Too bad, but that sort of thing may be outside their wheelhouse. I don't think NHTSA has anything.

The Hurt study is now pretty well ancient, but it didn't touch on the subject, I suppose because it was centered in California where we've always shared and, back then, there wasn't much of a way to separate data along the lines of lane sharing/non-lane sharing.

Thanks for looking into the Utah law. It sounds like a small step forward, but a step forward. Laws are usually proscriptive and it sounds like the Utah law is defining what is allowable rather than re-writing their VC along the lines of California's non-proscriptive VC. Makes sense as that would be a major re-vamping activity that would likely fail under its own weight. Any state that is going to legalize lane sharing will have to do the same.

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Last edited by Tom Schmitz; 04-05-2019 at 12:31 PM.
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post #17 of 44 Old 04-05-2019, 12:36 PM Thread Starter
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The Hurt study is now pretty well ancient, but it didn't touch on the subject, I suppose because it was centered in California where we've always shared and, back then, there wasn't much of a way to separate data along the lines of lane sharing/non-lane sharing..
Unabashededly shameless name-dropping:

Hurt was one of my professors at USC.

DISCLAIMER: No bribes were involved in my matriculation at the University of Southern California!

Hugh Harrison Hurt was a thoroughly competent and knowledgeable instructor; a splendid gentleman; one of US! ("US," being the motorsports community.)

Thanks to his research, and that of his colleagues, we ALL wear energy-abosorbing helmets today. Before his studies and experimentation, helmets used elastic suspensions, whose spring-back G-forces were sometimes greater than those of the initial impact.

Hugh Harrison Hurt was inducted into the American Mortorcyclists Association Hall of Fame before his death.

“You better put down that gun. You got two ways to go, put it down or use it. Even if you tie me, you’re gonna be dead.” "John Russell" (Paul Newman), Hombre
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post #18 of 44 Old 04-05-2019, 12:48 PM
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The Cal Berkeley study is easily found online. There are many other studies.
You keep saying that, but provide no references. Saying something over and over doesn’t make it true.
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post #19 of 44 Old 04-05-2019, 01:23 PM
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Quote:
Originally Posted by Slaugo View Post
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.

Tom [email protected]

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“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


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post #20 of 44 Old 04-05-2019, 01:32 PM
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@Voyager, here is something from Washington state that I had in my favorites; turns out the link is still active. This paper talks about the Berkeley study. This paper was published in December of '17. Above I had mentioned that I could not find the Berkeley study in the latter cycle of AB51, which would have been late '16. Perhaps I was differently-abled when I searched, or perhaps the Washington paper was written well before its publishing date.

At any rate, it cites some other studies that you might find interesting.
https://wtsc.wa.gov/wp-content/uploa...ng_Dec2017.pdf
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“You talk too damn much and too damn much of it is about you.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


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