<div dir="ltr">I wonder how they keep aircraft from landing on top of each other on the runway when the skip forward or back?</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, May 13, 2014 at 4:08 PM, Paul Eggert <span dir="ltr"><<a href="mailto:eggert@cs.ucla.edu" target="_blank">eggert@cs.ucla.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>On 05/13/2014 10:49 AM, Steve Allen wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
the line "Planes will crash" becomes pitted against the lack of evidence that has ever happened.<br>
</blockquote>
<br></div>
I would guess that air safety issues concerning daylight saving time are more about the transitions than about when the transition rules change. Although it was long assumed that people readily compensate for DST transitions, more recent research suggests that sleep loss persists for several days, and that this can increase automobile accident rates. As far as I know, DST's effect on air safety has never been studied; one might presume it's smaller than in automobile safety since pilots need to adjust to time zone changes anyway, but DST also affects ground crews who don't move that much.<br>
<br>
For a recent review of sleep-related concerns, please see:<br>
<br>
Harrison Y. The impact of daylight saving time on sleep and related behaviours. Sleep Med Rev. 2013 Aug;17(4):285–92. <a href="http://dx.doi.org/10.1016/j.smrv.2012.10.001" target="_blank">http://dx.doi.org/10.1016/j.<u></u>smrv.2012.10.001</a><br>
<br>
</blockquote></div><br></div>