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Strict Standards: Declaration of Walker_Page::end_el() should be compatible with Walker::end_el($output) in /home/signaltraffic/www/blog/wp-includes/classes.php on line 534

Strict Standards: Declaration of Walker_PageDropdown::start_el() should be compatible with Walker::start_el($output) in /home/signaltraffic/www/blog/wp-includes/classes.php on line 553

Strict Standards: Declaration of Walker_Category::start_lvl() should be compatible with Walker::start_lvl($output) in /home/signaltraffic/www/blog/wp-includes/classes.php on line 649

Strict Standards: Declaration of Walker_Category::end_lvl() should be compatible with Walker::end_lvl($output) in /home/signaltraffic/www/blog/wp-includes/classes.php on line 649

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Strict Standards: Declaration of Walker_Category::end_el() should be compatible with Walker::end_el($output) in /home/signaltraffic/www/blog/wp-includes/classes.php on line 649

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Caution Optional » 2008 »

Archive for November, 2008

The shape of things to come?

“The shape of traffic lights has barely changed since they were invented—there have always been three round lights: red, yellow and green. Initially, the sections were round simply because this allowed the spherical bulp inside light the glass evenly.
Today traffic lights use superbright light diodes that can be arranged in any way. And the sections […]