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An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
the theory behind the law dates back a long time and the theory had something to do with the possibility of the air-cooled engines overheating if they were stopped in traffic.
self-driving cars and lane splitting
Posted Feb 23, 2013 3:07 UTC (Sat) by giraffedata (subscriber, #1954)
Of course, like I said, any individual cop could establish a 15 mph speed limit and that could be where that came from. My search indicated that the California Highway Patrol actually has formal guidelines for its cops in interpreting the generic unsafe driving law with regard to lane splitting, and they don't include a 15 mph speed limit.
Posted Feb 23, 2013 3:53 UTC (Sat) by sfeam (subscriber, #2841)
Posted Feb 23, 2013 22:39 UTC (Sat) by giraffedata (subscriber, #1954)
Posted Feb 25, 2013 6:26 UTC (Mon) by speedster1 (subscriber, #8143)
"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."
"Travel at a speed that is no more than 10 MPH faster than other traffic -- danger increases at higher speed differentials."
Posted Feb 25, 2013 7:07 UTC (Mon) by giraffedata (subscriber, #1954)
Driving between lanes is definitely legal in California,
Nope. The quotation from someone at the California Highway Patrol does uses the phrase "between lanes," but obviously doesn't mean that. If you read it in context, you see this author is using the term "lane" to refer to a line of cars. Yes, it's legal to drive between two lines of cars, but the normal definition of lane, and the one used in the motor vehicle code, is the pavement, not the vehicles on it. Strictly speaking, there isn't even any space between two adjacent lanes, but it could refer to straddling the border between the lanes. That's the way some motorcyclists do it, and it is not legal. A motorcycle, like any other vehicle, must drive entirely within a lane, following specific procedures to move from one to another. That's why the terms are "lane splitting" and "lane sharing" and not "lane ignoring."
As I understand it, the only thing about the California vehicle code that makes lane splitting legal is that there's nothing that says you can't, whereas in other jurisdictions there's something that says you can't pass a vehicle in the same lane. I.e. the California code doesn't give special license to a motorcylist to e.g. straddle two lanes.
Posted Feb 25, 2013 8:35 UTC (Mon) by speedster1 (subscriber, #8143)
"lane sharing, filtering or white-lining, refers to the process of a motorcyclist riding between lanes of stopped or slower moving traffic"
White-lining is rather suggestive synonym, don't you think? So if you're right about their use of terminology, then no, the context wasn't clear. White-lining sure sounds like "lane straddling" to me.
On the other hand, I don't see that staying on one side of the line or not makes much practical difference to the California drivers (human and computer) who need to watch out for these faster-moving motorcycles when changing lanes, so this wasn't really a key point -- I'm done trying to figure out what the policy really is, since I don't ride a motorcycle.
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