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<p>One thing that is an issue with many of the marked bike lanes in
Nashville, TN is that they aren't contiguous. You will come to a
point where the road narrows, such as for a bridge, and the bikes
are forced to share a lane with motor traffic. This makes bike
riding at rush hour a risky activity.<br>
</p>
<div class="moz-cite-prefix">On 02/16/2017 10:38 AM, Paul Johnson
wrote:<br>
</div>
<blockquote
cite="mid:CAMPM96o5W7XMoCgevfLRz0Z-Xcucm3U-BJbDzySt0n4tpy9qrA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">On Thu, Feb 16, 2017 at 10:11 AM,
Spencer Gardner <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:spencergardner@gmail.com" target="_blank">spencergardner@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Good catch on the MUTCD language. I'm not
opposed to tagging with a bike lane and a parking lane,
but then what should be used as the assumed width of the
bike lane? This has direct relevance for my application,
where I need to know how wide a bike lane is. Would you
suggest an assumed width for parking and then subtract
from the total to arrive at the operable space for
people on bicycles?</div>
</blockquote>
<div><br>
</div>
<div>Check the local standard and get a sample. Current
federal guidelines put parking at 8 feet (and is fairly
typical), bicycle lanes must be 4 feet minimum, 5 feet if
there's parking adjacent, measured from the edge of the
gutter pan, or if there is none, the curb face or the edge
of the roadway (being either the physical edge or the
painted edge, whichever is closer to the centerline) to
the inside of the lane marking. Oregon-specific, 6 feet
any time an adjacent lane allows motor vehicles or is
oncoming. In practice, it's rare to see a lane less than
6 feet wide anymore regardless of application because a
cargo bike, most adult tricycles and many bikes pulling
trailers are a tight squeeze in a six foot lane. It's
starting to get common to see 7 foot lanes in Oregon,
often with a 1 foot buffer on the left and a two foot
buffer between the right edge of the lane and the edgeline
itself, for a 10 foot single-file bike lane.</div>
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