CMSP Lane Splitting Guidelines issued

budman

General Menace
Staff member
http://www.chp.ca.gov/programs/motorcycle.html

The State has issued official CMSP Lane Splitting guidelines.

Silversvs and I worked through this with the CA Mission 12 Motorcycle Safety Committee and John also had set up the first ever Lane Sharing Summit, which several other barfers attended to help shape these.

Very cool that we could help and I think with official guidelines in place the practice will be safe from being taken away.

My only fear with this is that these could potentially become law one day and will now be the guideline for officers to use to determine if you are doing it safely thus allowing tickets for such actions that do not conform to these standards to be the basis for such actions by the Officer.

I think these are generally very good guidelines, but seasoned riders can certainly share at higher than the listed speed and be safe IMO. I fought the law on that one, but the law won..:laughing

However..I do agree since this is a general guideline it does not take into account the experience one rider may have.

You can download the PDF off the website above.

Please share this with as many cagers as you can. The State survey on the activity showed that almost 50% of CA drivers were unaware splitting is not illegal..! :wow

Here they are:

Lane Splitting General Guidelines

Lane splitting in a safe and prudent manner is not illegal in the state of California.

The term lane splitting, sometimes known as lane sharing, filtering or white-lining, refers to the process of a motorcyclist riding between lanes of stopped or slower moving traffic or moving between lanes to the front of traffic stopped at a traffic light.

Motorcyclists who are competent enough riders to lane split, should follow these general guidelines if choosing to lane split:

1) Travel at a speed that is no more than 10 MPH faster than other traffic – danger increases at higher speed differentials.

- A speed differential of 10 miles per hour or less allows an alert, competent rider enough time to identify and react to most dangerous situations that can occur.

- The greater the speed differential, the less time a rider has to identify and react to a hazard.


2) It is not advisable to lane split when traffic flow is at 30 mph or faster --- danger increases as overall speed increases.

- At just 20 mph, in the 1 or 2 seconds it takes a rider to identify a hazard, that rider will travel approximately 30 to 60 feet before even starting to take evasive action. Actual reaction (braking or swerving) will take additional time and distance.

- Braking and stopping distance varies greatly based on a multitude of factors (rider, machine and environment).

- As speed increases, crash severity increases.

3) Typically, it is safer to split between the #1 and #2 lanes than between other lanes.

- Other road users are more accustomed to motorcycles splitting between the #1 and #2 (furthest left) lanes.

- Avoid splitting in lanes near freeway on-ramps and exits.

- Avoid splitting lanes when another motorcycle rider is splitting between other nearby lanes as cars may make additional room for one rider and accidentally reduce space for another.

4) Consider the total environment in which you are splitting, including the width of the lanes, size of surrounding vehicles, as well as roadway, weather, and lighting conditions.

- Some lanes are narrower than others, leaving little room to pass safely. If you can't fit, don't split.

- Some vehicles are wider than others -- it is not advisable to split near wide trucks. If you can't fit, don't split.

- Know the limitations of your motorcycle --- wide bars, fairing and bags require more space between vehicles. If you can't fit, don't split.

- Avoid splitting on unfamiliar roads to avoid surprises such as poor road surfaces.

- Seams in the pavement or concrete between lanes can be hazardous if they are wide or uneven.

- Poor visibility, due to darkness or weather conditions, makes it difficult for riders to see road hazards and makes it more difficult for drivers to see you.

- Help drivers see you by wearing brightly colored protective gear and using high beams during daylight.


5) Be alert and anticipate possible movements by other road users.

- Be very aware of what the cars around you are doing. If a space, or gap, opens up next to your lane, be prepared react accordingly.

- Always be prepared to take evasive action if a vehicle changes lanes.

- Account for inattentive or distracted drivers.

- Riders should not weave back and forth between lanes or ride on top of the line.

- Riders should avoid lingering in blind spots.

- Never ride while impaired by drugs, alcohol or fatigue.

- Constantly scan for changing conditions.


The Four R's or “Be-Attitudes” of Lane Splitting:

Be Reasonable, be Responsible, be Respectful, be aware of all Roadway and traffic conditions.


- Be Reasonable means not more than 10 MPH faster than traffic flow and not over 39 MPH.

- Be Responsible for your own safety and decisions.

Don't put yourself in dangerous positions.
If you can't fit, don't split.

- Be Respectful --- sharing the road goes both ways.
Don't rely on loud pipes to keep you safe, loud pipes often startle people and poison the attitude of car drivers toward motorcyclists.
Other vehicles are not required to make space for motorcycles to lane split.

- Be aware Roadways and traffic can be hazardous.
uneven pavement, wide trucks, distracted drivers, weather conditions, curves
etc.

Disclaimers:

These general guidelines are not guaranteed to keep you safe.

Lane splitting should not be performed by inexperienced riders. These guidelines assume a high level of riding competency and experience.

The recommendations contained here are only general guidelines and cannot cover all possible combinations of situations and variables.

Personal Safety: Every rider has ultimate responsibility for his or her own decision making and safety. Riders must be conscious of reducing crash risk at all times. California law requires all motorcycle riders and passengers wear a helmet that complies with the DOT FMVSS 218 standard.

Risk of getting a ticket: Motorcyclists who lane split are not relieved of the responsibility to obey all existing traffic laws. With respect to possible law enforcement action, keep in mind that it will be up to the discretion of the Law Enforcement Officer to determine if riding behavior while lane splitting is or was safe and prudent.


When is it NOT OK to split?

You should NOT lane split:

- If you can't fit.

- At a toll booth.

- If traffic is moving too fast or unpredictably.

- If dangerous road conditions exist --- examples include water or grit on the road, slippery road markings, road construction, uneven pavement, metal grates, etc.

- If you cannot clearly see a way out of the space you're going into (for example, if a van or SUV is blocking your view).

- Between trucks, buses, RVs, and other wide vehicles.

- Around or through curves.

- If you are not fully alert and aware of your surroundings.

- If you are unable to react to changing conditions instantaneously.

- If you don't feel comfortable with the situation.


Messages for Other Vehicle Drivers

1) Lane splitting by motorcycles is not illegal in California when done in a safe and prudent manner.

2) Motorists should not take it upon themselves to discourage motorcyclists from lane splitting.

3) Intentionally blocking or impeding a motorcyclist in a way that could cause harm to the rider is illegal (CVC 22400).

4) Opening a vehicle door to impede a motorcycle is illegal (CVC 22517).

5) Never drive while distracted.

6) You can help keep motorcyclists and all road users safe by

Checking mirrors and blind spots, especially before changing lanes or turning
Signaling your intentions before changing lanes or merging with traffic
Allowing more following distance, three or four seconds, when behind a motorcycle so the motorcyclist has enough time to maneuver or stop in an emergency
 

TheRiddler

Riddle me this.
I'm curious how this will affect the MSF curriculum. We've previously been instructed to generally advise in a broader sense how lane splitting completely eliminates any safety/space cushion.
 

StreetDesire

MSF Rider Coach
they might still say they (MSF Rider Coaches) don't condone it but more advanced riders are able to follow the 4-Rs (mentioned above) to minimize their risk in stopped or slow traffic. something along those lines.
 

pmottaz

Well-known member
Good guidelines, pretty much mirrors how I've always approached lane sharing.

It'd be real nice if the state would put the 6 "Messages to Other Vehicle Drivers" on the message alert signs. Especially the first 3. ;-)
 

Enchanter

Ghost in The Machine
Staff member
I'm curious how this will affect the MSF curriculum. We've previously been instructed to generally advise in a broader sense how lane splitting completely eliminates any safety/space cushion.

I'd be surprised if it changes the way we handle it given the fact that the risks are the same as they've always been in-spite of the new guidelines. The space cushion is still the same, essentially zero.
 

MCSFTGUY

Seriously Disturbed Calm
I'd be surprised if it changes the way we handle it given the fact that the risks are the same as they've always been in-spite of the new guidelines. The space cushion is still the same, essentially zero.

I have always had trouble grasping the MSF position on this... it is one diminsional.... litterally.

The MSF is absolutely right, there is no space cushion, side to side... front to back, virtually unlimited.

Not lane sharing and sitting in stop and go traffic, the side to side space cushion is ok, but the front to back space cushion is very limited.

I have talked to a friend of mine about this, he is aware of two unpublished reports one that puts the lane sharing crashes from the Hurt report at at 0.6% of the crashes looked at.... This corresponds with what was in the MAIDS report, 0.4% done 25 years later.... My buddy says he is aware of other research that puts fatal lane sharing crashes at 1%. All very consistent numbers.

Since these are unpublished reports my friend would not give me the authors names.

Again, some unpublished recent work on lane sharing has shown that riders who don't lane share tend to follow the vehicle infront of them too closely. This is really bad because published studies in the collision reconstruction field as well as research show that on average riders do not brake very well. This is a set-up for a rear end crashing.

All in all... space cushion or no space cushion the data seems to indicate that lane sharing is a crash prevention tactic. We can also say this in the converse fashion, there is no data that says it isn't.

Just what I have heard through the grapevine.
 
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Makes sense. When you look at the "space cushion" between vehicles, and comparing the left-right space to the front-rear, you also have to look at the speed in which things go wrong for both. Things can go wrong QUICK in front of you. Things that come at you from the left or right are very, very slow.
 

RRrider

Enthusiast, Fukrwe Club
Things that come at you from the left or right are very, very slow.
Hmmm...within context of lane sharing, maybe. A car travelling at +/- 10mph your speed deciding to change langes is likely to move relatively "slowly" into your lane, so a lanesharer can safely adjust most of the time.

In an accident situation, a car can either aggressively swerve or be knocked quite quickly left or right.

And of course in an intersection, the left to right motion can be quite quick indeed.

All of this said, I lane share and believe it to be safer than the risk of being hit from behind in traffic, not to mention much more convenient than being stuck in traffic.
 

KittenMeat

Life: It's Terminal!
I moved from a non lane splitting state. Too many friends have been hit and severely injured in rear end collisions in traffic, when car drivers like to fiddle with their iphones. It's not even illegal in the state that I'm from.

This being said, I find it pretty easy to lane split under 40 mph with one foot covering the brake and the other hand covering the clutch.

After doing it I couldn't believe this practice was illegal...


then I saw some guy with a glued on mohawk on his helmet lane splitting...
and i realized why people hate us.
 
Hmmm...within context of lane sharing, maybe. A car travelling at +/- 10mph your speed deciding to change langes is likely to move relatively "slowly" into your lane, so a lanesharer can safely adjust most of the time.

Exactly. I'm not talking about at an intersection where you're at risk of being t-boned. Im talking about while there's cars on both sides of you and you're riding up the middle. I've never been hit by a car next to me. I've been pushed out of my lane before by a car merging into my lane, and it's infuriated me, but it's never been ACTUALLY life threatening.

I would imagine it's the same as riding on a race track next to someone else. You just mimic their line. If a bike was to come at you from the side without even thinking survival instincts move you over. You can be inches from a vehicle and still have time to react to a car wobbling in their lane or moving over.

Compared to the amount of space needed to react to things in front of you, the space needed to react to things to the side is very small. Things in front of you require that you are in the right gear, covering the front brake, capable of seeing beyond the Giant suv with the tinted windows so you know when they're going to panic brake... When things happen left or right you just need to have your hands on the grips.
 
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Enchanter

Ghost in The Machine
Staff member
You can be inches from a vehicle and still have time to react to a car wobbling in their lane or moving over.

100% disagree.

You are assuming that the car moves into your lane relatively slowly. Here are two examples:

http://www.bayarearidersforum.com/forums/showthread.php?t=425773

http://bayarearidersforum.com/forums/showpost.php?p=2455401&postcount=18

In these two incidents, the motorcyclists were not lane-sharing, but that doesn't matter here. The fact is that automobiles can quickly moved into the lane.
 

DataDan

Mama says he's bona fide
Makes sense. When you look at the "space cushion" between vehicles, and comparing the left-right space to the front-rear, you also have to look at the speed in which things go wrong for both. Things can go wrong QUICK in front of you. Things that come at you from the left or right are very, very slow.
How quickly something happens depends on how much time you have to react and respond effectively. If a truck loses a load of bricks up ahead, but it's 12 seconds in front of you, it's a slo-mo event and you just roll off the throttle and find a way around the debris. If you're tailgating the truck, it happens instantly. The two examples Enchanter linked, Kornholio's crash and his own, show just how quickly a threat can develop from an adjacent lane.

Your perception that things go south slowly when splitting may be because you keep your relative speed down. If that's the case, then :thumbup. But you're still vulnerable to a lateral threat, though only when you're very close to the threatening vehicle. Kornholio's crash was a perfect example. He was riding slowly and had distanced himself from the next lane, but the vehicle still hit him.

If hazards ahead of you seem to develop quickly, you might want to think about your following distance and visual scan habits. If you're maintaining 2 seconds following distance OR you have a good view to traffic beyond the vehicle immediately ahead, it's unlikely you'll be caught out by a sudden slowdown. Most likely, you'll anticipate it and no emergency action will be required. But if you're tailgating AND you can't see beyond the next vehicle's back bumper, stuff will indeed happen in a hurry.
 
@datadan, my point is that you need less reaction time to cars next to you, because you just need to yank on the bars, which you're definitely holding. When things are in front of you, you need more time to cover a brake lever and apply the brakes, which most motorcyclists suck at.

@ enchanter, where were you in relation to the vehicle, when the vehicle initiated a turn? Beside? Behind? something similar happened to me, but I was new and I didn't trust my brakes enough.

My take on that is in both situations the motorcycle was blocked from view by the car ahead. Most left side mirrors are aimed down the left side of their cars, so why not hug the white line instead of being behind the car in front of you, all the cars in the right lane would know you're there. Or move all the way to the inside?

That's my take on all that.
 
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Enchanter

Ghost in The Machine
Staff member
Do I really have to explain to you that motorcycles are smaller and more difficult to see than cars? I. It is also more difficult to accurately judge the speed of smaller objects.

You are also making the assumption that the automobile driver has there mirrors adjusted in a manner that you think the are/should.
 
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