Tom Orth
I suspect this would be true for any intersection where there isn't a
dedicated left turn lane with left turn arrow. In other words, any four
way intersection controlled by stoplights without a dedicated left turn
lane with left turn arrow operates such that a green light, when making a
left turn, is to be interpreted the exact same way as a flashing yellow
arrow when there is a dedicated left turn lane (that is to say, yield to
oncoming traffic and turn left when safe to do so).
Basically, what this study shows is that unless you have either an all red
or all green left turn arrow with a dedicated left turn lane, left turns
are relatively dangerous.
On Wed, May 1, 2013 at 11:07 AM, Todd Mobley
wrote:
> Actually, it was a cooperative effort between OSU and PSU that pertains to
> pedestrian safety. OSU was the principal investigator. Here is a link to
> the research:
>
> http://otrec.us/project/484
>
> That's the research that is the basis for the news story. Be careful
> though, the research is really targeted at pedestrian safety in the
> crosswalk. That issue is really rooted in permitted left turns (yielding to
> oncoming traffic) and less so the flashing yellow arrow indication
> specifically.
>
> The research is NOT targeted at driver comprehension of the flashing
> yellow arrow, which was at issue in that bike/car collision at Powell and
> Kane that started this thread. There is plenty of other research on that
> topic.
>
> If you want to form your own opinions without any media spin...
>
> -Todd
>
> Todd E. Mobley, PE, PTOE | Principal
> Lancaster Engineering | www.lancasterengineering.com
> 321 SW 4th Avenue, Suite 400 | Portland, OR 97204
> O: 503-248-0313 | C: 503-319-9811 | todd@lancasterengineering.com
>
>
> On Wed, May 1, 2013 at 10:25 AM, SB wrote:
>
>> How timely, OSU just completed a study that shows how dangerous
>> "permitted" left hand turns are:
>>
>> http://www.kgw.com/news/Study-finds-permitted-left-turns-put-lives-at-risk-205490761.html
>>
>> I've witnessed a couple of crashes at NE Sandy and 28th between cars who
>> didn't understand the rules...
>>
>> On Apr 30, 2013, at 11:47 AM, Tom Orth wrote:
>> > The blinking yellow arrow is common in most of the country. I'm not
>> sure why, but these are relatively new in Oregon, and I've encountered a
>> number of Oregonians who seem confused by these and I'm not sure why. It's
>> the same as making a left turn when there is no dedicated left turn lane
>> and left turn arrow. You always yield to oncoming traffic. Yellow always
>> means yield/proceed with caution. These are a good thing, especially for
>> cyclists. Sitting at a left turn red arrow, hoping a car comes to trip the
>> green is no fun either.
>> >
>> >
>> > On Tue, Apr 30, 2013 at 10:08 AM, Kevin wrote:
>> > Hopefully ignorance of the law will not allow the driver to avoid a
>> citation for failure to yield.
>> >
>> > Sent from my Verizon Wireless 4G LTE smartphone
>> >
>> >
>> > -------- Original Message --------
>> > Subject:[OBRA Chat] Be careful out there.
>> > From :Scott Jones
>> > Date :Tue, 30-Apr-2013 09:49
>> > To :OBRA List
>> > CC :
>> >
>> > This morning I witnessed a head on crash between a car and a bicycle.
>> This took place at an intersection where the turn lights recently adopted
>> that stupid yellow left turn blinking arrow. Just another obstacle for us
>> on two wheels. I don't like them even when I'm driving, let alone on my
>> bike. The woman who was hit thankfully will be okay, but the driver told
>> the police officer she thought she had the right of way. I wish there was
>> more required education for all road users, yes including us on two wheels.
>> >
>> > Be careful out there and send healing thoughts or prayers to a nice
>> lady named Kelly (not and OBRA member).
>> >
>> > Scott Jones
>> > Damascus Christian High School
>> > Head Track Coach
>> > 971-998-2132
>> >
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>
>
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